KR20010081288A - SRM with reinforced rotator and sensing ring magnet - Google Patents

SRM with reinforced rotator and sensing ring magnet Download PDF

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Publication number
KR20010081288A
KR20010081288A KR1020000006501A KR20000006501A KR20010081288A KR 20010081288 A KR20010081288 A KR 20010081288A KR 1020000006501 A KR1020000006501 A KR 1020000006501A KR 20000006501 A KR20000006501 A KR 20000006501A KR 20010081288 A KR20010081288 A KR 20010081288A
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KR
South Korea
Prior art keywords
rotor
ring magnet
sensing ring
srm
molding
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KR1020000006501A
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Korean (ko)
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KR100335818B1 (en
Inventor
김상영
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구자홍
엘지전자주식회사
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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K1/00—Details of the magnetic circuit
    • H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
    • H02K1/22—Rotating parts of the magnetic circuit
    • H02K1/24—Rotor cores with salient poles ; Variable reluctance rotors
    • 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
    • H02K1/14—Stator cores with salient poles

Abstract

PURPOSE: A rotor for SRM and a structure for reinforcing sensing ring magnet of the same are provided to prevent an impairment of a sensing ring magnet and a noise in case of a rotor operation by preparing a molding substance respectively at a hollow of the rotor and at an upper part of the sensing ring magnet. CONSTITUTION: A rotor(10) has a penetration hole for a rotation axis(30) at central part, and has a plurality of protrusion unit which protrudes in equal interval at the edge to form a hollow. A sensing ring magnet(20) is settled at axial front face part of the rotor(10), performs an initial operation of the rotor and detects position information. A hanging wedge unit is formed in the protrusion unit in side direction. The hollow is filled with a molding substance. A molding substance(22) is joined fixedly with both upper edges of the sensing ring magnet(20).

Description

에스.알.엠의 회전자 및 센싱 링마그네트 보강구조{SRM with reinforced rotator and sensing ring magnet}S.RM with reinforced rotator and sensing ring magnet

본 발명은 SRM에 관한 것으로서, 보다 상세하게는 회전자와 센싱 링마그네트가 보다 견고한 구조로 이루어짐으로써, 작동안정성이 향상되는 SRM에 관한 것이다.The present invention relates to an SRM, and more particularly, to an SRM, in which a rotor and a sensing ring magnet have a more rigid structure, thereby improving operation stability.

일반적으로 SRM(switched reluctance motor)은 회전자에 권선이나 영구자석이 없는 구조로 이루어지고, 구동회로가 간단하여 제작비용이 저렴하고, 회전자의 관성이 적으며 넓은 범위의 속도에서 고효율운전이 가능하기 때문에 그 구조 및 작동상 여러 이점을 갖는 전동기이다.In general, the switched reluctance motor (SRM) is made of a structure without windings or permanent magnets in the rotor, and the driving circuit is simple, so the manufacturing cost is low, the inertia of the rotor is low, and high efficiency operation is possible at a wide range of speeds. Therefore, the motor has various advantages in structure and operation.

이와 같은 SRM에는, 도 1에 나타난 것과 같이 회전작동을 수행하는 회전자(10)와, 상기 회전자(10)의 위치 정보를 검출하기 위한 센싱 링마그네트(20)가 구비되어 있는데, 상기 센싱 링마그네트(20)는 회전자(10)의 전면부에 고정 장착되며, 그 단면이 단순한 장방형을 이루는 구조로 이루어져 있다.The SRM is provided with a rotor 10 performing a rotation operation as shown in FIG. 1, and a sensing ring magnet 20 for detecting position information of the rotor 10. The magnet 20 is fixedly mounted to the front portion of the rotor 10, the cross section is made of a simple rectangular structure.

그리고, 회전자(10)는 도 2에 나타난 것과 같이, 중심에 회전축(30)의 장착을 위한 관통홀(10a)이 형성되고, 횡단면 구조상 가장자리에 등간격으로 돌출됨으로써 그 사이사이에 공동을 형성하는 다수개의 돌기부(101)가 방사상으로 구비된 형태로 이루어져 있다.And, as shown in Figure 2, the rotor 10, the through-hole 10a for mounting the rotating shaft 30 is formed in the center, and protrudes at equal intervals in the cross-sectional structure to form a cavity therebetween. The plurality of protrusions 101 is made of a radially provided form.

또한, 센싱 링마그네트(20)의 외주방향에는 일정간격을 두고 파킹 마그네트(30)가 구비되어 있는데, 상기 센싱 링마그네크(20)는 상기 파킹 마그네트(30)와의 상호작용에 의해 회전자(10)의 초기 기동작동이 이루어지도록 하는 역할도 한다.In addition, the outer peripheral direction of the sensing ring magnet 20 is provided with a parking magnet 30 at a predetermined interval, the sensing ring magnet 20 is the rotor 10 by the interaction with the parking magnet 30 It also plays a role in making initial start-up of).

이와 같이 구성된 SRM은, 회전 작동 시 센싱 링마그네트(20)가 회전자(10)와 함께 회전함으로써 별도의 센서와 상호작용하여 회전자(10)의 위치정보를 파악토록 하며, 전술한 바와 같이 파킹 마그네크(30)와 상호작용하여 회전자(10)의 초기 기동작동을 가능케 한다.In the SRM configured as described above, the sensing ring magnet 20 rotates together with the rotor 10 during rotation operation to interact with a separate sensor to grasp the position information of the rotor 10, and the parking as described above. Interact with the magnetek 30 to enable the initial starting operation of the rotor 10.

그러나, 상술한 바와 같은 종래기술에 의하면, 회전자(10)가 대략 40000rpm을 초과하는 고속으로 회전할 경우, 센싱 링마그네트(20)가, 그 단면구조상(단순 장방형) 양 가장자리에 강한 원심력에 의한 응력이 집중됨으로써, 파손되는 경우가 종종 발생하게 된다.However, according to the prior art as described above, when the rotor 10 rotates at a high speed exceeding approximately 40000 rpm, the sensing ring magnet 20 is caused by a strong centrifugal force on both edges of the cross-sectional structure (simple rectangular). As the stress is concentrated, breakage often occurs.

또한, 회전자(10)의 경우에는 회전작동 시 돌기부(101) 사이에 형성된 공동으로 공기가 유입됨으로써 소음이 발생하고, 돌기부의 돌출 구조상 강한 공기저항을 받게 된다.In addition, in the case of the rotor 10, when the air flows into the cavity formed between the protrusions 101 during the rotation operation, noise is generated and a strong air resistance is received due to the protruding structure of the protrusions.

따라서, 이와 같은 종래기술에 의하면 회전자의 형태 및 센싱 링마그네트의 구조적인 취약성 때문에 SRM의 작동안정성 및 효율이 떨어진다는 문제점이 발생한다.Therefore, according to the related art, there is a problem in that the operation stability and efficiency of the SRM are deteriorated due to the shape of the rotor and the structural weakness of the sensing ring magnet.

본 발명은 상기한 종래 문제점을 해결하고자 안출된 것으로서, 회전자의 고속회전 시에도 원심력에 의한 센싱 링마그네트의 파손이 방지됨과 아울러, 회전자의 구조적인 특성상, 소음이 발생하거나 및 공기저항에 의한 작동효율이 저하되는 것을 방지하는 목적으로 한다.The present invention has been made to solve the above-mentioned conventional problems, the damage of the sensing ring magnet due to the centrifugal force is prevented even during high-speed rotation of the rotor, and due to the structural characteristics of the rotor, noise is generated and due to air resistance It aims to prevent operation efficiency from falling.

도 1은 일반적인 SRM의 회전자 및 센싱 링마그네트의 구조를 나타낸 종단면도이다.1 is a longitudinal sectional view showing the structure of a rotor and a sensing ring magnet of a typical SRM.

도 2는 종래 SRM의 회전자 구조를 나타낸 횡단면도이다.2 is a cross-sectional view showing a rotor structure of a conventional SRM.

도 3은 본 발명의 실시예에 따른 SRM의 회전자 및 센싱 링마그네트의 구조를 나타낸 종단면도이다.Figure 3 is a longitudinal sectional view showing the structure of the rotor and the sensing ring magnet of the SRM according to an embodiment of the present invention.

도 4는 본 발명의 실시예에 따른 SRM의 회전자 구조를 나타낸 횡단면도이다.4 is a cross-sectional view showing the rotor structure of the SRM according to an embodiment of the present invention.

<도면의 주요 부분에 대한 부호의 설명><Explanation of symbols for the main parts of the drawings>

10: 회전자 10a: 관통홀10: rotor 10a: through hole

101: 돌기부 102: 걸림쐐기부101: projection 102: locking wedge

12: 몰딩물 20: 센싱 링마그네트12: molding 20: sensing ring magnet

22: 몰딩물 30: 파킹 마그네트22: molding 30: parking magnet

상기 목적을 달성하기 위하여 제공되는 SRM의 회전자 및 센싱 링마그네트 보강구조는 회전자의 돌기부에 측방향으로 돌출된 걸림쐐기부가 형성되고, 각 돌기부사이의 공동에는 몰딩물이 채워짐과 더불어, 상기 센싱 링마그네트가 상부 돌출형으로 형성되고 그 상부의 양 가장자리에 몰딩물이 고정 접합되는 것을 특징으로 하여 이루어진다.Rotor and sensing ring magnet reinforcement structure of the SRM provided to achieve the above object is formed with a locking wedge protruding laterally in the protrusion of the rotor, the cavity between each protrusion is filled with a molding, the sensing The ring magnet is formed in the upper protruding shape, characterized in that the molding is fixedly bonded to both edges of the upper portion.

이하, 본 발명의 실시예를 첨부된 도 3과 도 4를 참조로 하여 상세하게 설명한다.Hereinafter, embodiments of the present invention will be described in detail with reference to FIGS. 3 and 4.

본 발명의 실시예에 따른 SRM의 회전자 및 센싱 링마그네트의 보강구조에 의하면 회전자 및 센싱 링마그네트가 별도의 몰드물과 견고하게 결합 가능한 구조로 이루어지는데, 도 3에 나타난 것과 같이 상기 센싱 링마그네트(20)의 경우에는 그 상부가 대략 ‘凸 ’의 돌출형으로 이루어지고, 상단의 양가장자리에 몰드물(22)이 고정 접합된다.According to the reinforcing structure of the rotor and the sensing ring magnet of the SRM according to an embodiment of the present invention, the rotor and the sensing ring magnet are made of a structure that can be firmly combined with a separate mold, as shown in FIG. In the case of the magnet 20, an upper portion of the magnet 20 is formed of a protrusion of approximately '대략', and the mold 22 is fixedly bonded to both edges of the upper end.

여기서, 센싱 링마그네트(20)에 고정 접합되는 몰드물(22)은 알루미늄 등과 같이 비교적 비중이 낮은 금속재질로 이루어지며, 접착제 등에 의해 접합되는 방식으로 부착된다.Here, the mold 22 fixedly bonded to the sensing ring magnet 20 is made of a metal material having a relatively low specific gravity, such as aluminum, and is attached in a manner of being bonded by an adhesive or the like.

그리고, 회전자(10)의 경우에는 도 4에 나타난 것과 같이 돌기부(101)에 측방향으로 돌출된 다수개의 걸림쐐기부(102)가 형성되고, 각 돌기부(101) 사이의 공동에는 합성수지와 같은 가벼운 재질의 몰딩물(12)이 채워진다.In the case of the rotor 10, as shown in FIG. 4, a plurality of locking wedges 102 protruding laterally are formed on the protrusions 101, and the cavity between the protrusions 101 is formed of a synthetic resin. The light molding 12 is filled.

상기 몰딩물(12)은 그 재질적인 특성(합성수지)상 회전자(10)의 돌기부(101) 사이에 형성된 공동에 용융 압입방식으로 주입됨으로써 공동을 채우게 되며, 고형화된 후에는 걸림쐐기부(102)에 의해 견고하게 결속된 상태를 유지하게 된다.The molding 12 fills the cavity by injecting it into the cavity formed between the protrusions 101 of the rotor 10 on the material property (synthetic resin) by melt-injection method, and after locking, the locking wedge 102 ) Will remain tightly bound.

상술한 바와 같이 구성된 본 발명의 실시예에 따른 SRM의 회전자 및 센싱 링마그네트 보강구조에 의하면 센싱 링마그네트(20)의 가장자리가 전술한 바와 같이 금속재질의 몰딩물(22)에 의해 감싸여진 상태이기 때문에 회전자(10)의 회전 작동시 발생하는 강한 원심력에 의해서도 파손되지 않는다.According to the rotor and the sensing ring magnet reinforcement structure of the SRM according to the embodiment of the present invention configured as described above, the edge of the sensing ring magnet 20 is surrounded by the metal molding 22 as described above. For this reason, it is not broken by the strong centrifugal force which arises at the time of the rotation operation of the rotor 10.

또한, 회전자(10)의 경우에는 공동이 몰딩물(12)에 의해 채워진 상태이기 때문에, 회전작동 시 종래기술에서와 같이 공기가 공동으로 유입되어 소음이 발생하는 현상이 방지되며, 외주면이 요철형상이 아닌 평면을 이루기 때문에 공기저항을 적게 받음으로써 작동효율이 향상된다.In addition, in the case of the rotor 10, since the cavity is filled by the molding 12, air is introduced into the cavity as in the prior art during the rotation operation, and noise is prevented, and the outer circumferential surface is uneven. Because it forms a plane rather than a shape, the air efficiency is improved by receiving less air resistance.

본 발명에 따른 SRM의 회전자 및 센싱 링마그네트의 보강구조에 의하면, 회전자의 공동과 센싱 링마그네트 상단에 구조적인 강도를 높이는 몰딩물이 구비됨으로써, 회전자의 회전 작동 시 센싱 링마그네트가 파손되거나, 공기유동에 따른 소음이 발생하는 현상이 방지됨과 더불어, 공기저항에 의해 회전자의 작동효율이 저하되는 현상이 방지되는 등, 결과적으로 SRM의 작동 안정성 및 성능 향상에 도움이 된다.According to the reinforcement structure of the rotor and the sensing ring magnet of the SRM according to the present invention, by providing a molding to increase the structural strength on the top of the cavity and the sensing ring magnet of the rotor, the sensing ring magnet is broken during rotation of the rotor In addition, the phenomenon that the noise caused by the air flow is prevented, and the phenomenon that the operating efficiency of the rotor is prevented by the air resistance is prevented, and consequently, it helps to improve the operational stability and performance of the SRM.

Claims (2)

중심부에 회전축의 관통되는 관통홀이 형성되고, 가장자리에 등간격으로 돌출됨으로써 그 사이사이에 공동을 형성하는 다수개의 돌기부가 방사상으로 구비된 형태의 회전자와;A rotor having a through-hole through which a rotating shaft is formed at a central portion thereof, and a plurality of protrusions radially provided at the edges so as to form a cavity therebetween; 상기 회전자의 초기 기동 및 위치 정보검출을 위해, 회전자의 축방향 전면부에 장착된 센싱 링마그네트Sensing ring magnet mounted on the axial front part of the rotor for initial starting and position information detection of the rotor 를 포함하는 SRM에 있어서,In the SRM comprising: 상기 회전자의 돌기부에는 측방향으로 돌출된 걸림쐐기부가 형성되고, 각 돌기부 사이의 공동에는 몰딩물이 채워지는 것을 특징으로 하는 SRM.The protrusion of the rotor is formed with a locking wedge protruding in the lateral direction, the cavity between each of the projections SRM, characterized in that the molding is filled. 제1항에 있어서, 상기 센싱 링마그네트는The method of claim 1, wherein the sensing ring magnet 그 상부가 돌출형으로 형성되고, 상부의 양 가장자리에 몰딩물이 고정 접합되는 구조로 이루어진 것을 특징으로 하는 SRM.SRM, characterized in that the upper portion is formed in a protruding shape, the molding is fixedly bonded to both edges of the upper portion.
KR1020000006501A 2000-02-11 2000-02-11 SRM with reinforced rotator and sensing ring magnet KR100335818B1 (en)

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20040042036A (en) * 2002-11-12 2004-05-20 엘지전자 주식회사 Rotor for switched reluctance motor
KR100437058B1 (en) * 2002-10-01 2004-06-23 엘지전자 주식회사 Single phase motor
KR100452381B1 (en) * 2002-10-31 2004-10-12 엘지전자 주식회사 Switched reluctance motor
KR100465712B1 (en) * 2002-11-04 2005-01-13 엘지전자 주식회사 Switched reluctance motor

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100437058B1 (en) * 2002-10-01 2004-06-23 엘지전자 주식회사 Single phase motor
KR100452381B1 (en) * 2002-10-31 2004-10-12 엘지전자 주식회사 Switched reluctance motor
KR100465712B1 (en) * 2002-11-04 2005-01-13 엘지전자 주식회사 Switched reluctance motor
KR20040042036A (en) * 2002-11-12 2004-05-20 엘지전자 주식회사 Rotor for switched reluctance motor

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