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WO2014104819A1 - Rotor of interior permanent magnet motor having structure for preventing permanent magnet from escaping - Google Patents

Rotor of interior permanent magnet motor having structure for preventing permanent magnet from escaping Download PDF

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Publication number
WO2014104819A1
WO2014104819A1 PCT/KR2013/012313 KR2013012313W WO2014104819A1 WO 2014104819 A1 WO2014104819 A1 WO 2014104819A1 KR 2013012313 W KR2013012313 W KR 2013012313W WO 2014104819 A1 WO2014104819 A1 WO 2014104819A1
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WO
WIPO (PCT)
Prior art keywords
permanent magnet
rotor
insertion groove
motor
rotor core
Prior art date
Application number
PCT/KR2013/012313
Other languages
French (fr)
Korean (ko)
Inventor
서정호
최소해
차창환
Original Assignee
주식회사 효성
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 주식회사 효성 filed Critical 주식회사 효성
Publication of WO2014104819A1 publication Critical patent/WO2014104819A1/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]
    • H02K1/2766—Magnets embedded in the magnetic core, e.g. interior permanent magnets [IPM] having a flux concentration effect
    • H02K1/2773—Magnets embedded in the magnetic core, e.g. interior permanent magnets [IPM] having a flux concentration effect consisting of tangentially magnetized radial magnets
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K21/00—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets
    • H02K21/12—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets with stationary armatures and rotating magnets
    • H02K21/14—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets with stationary armatures and rotating magnets with magnets rotating within the armatures
    • H02K21/16—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets with stationary armatures and rotating magnets with magnets rotating within the armatures having annular armature cores with salient poles

Definitions

  • the present invention relates to a rotor of a buried permanent magnet motor having a permanent magnet separation prevention structure, and in particular, a permanent magnet formed to have an open portion extended along an outer periphery of the rotor core in which a shaft insertion hole is formed and to have an inwardly expanded form. Permanent magnet piece is inserted into the insertion groove.
  • an AC motor is classified into an AC induction motor and an AC synchronous motor.
  • an armature winding is provided on the stator side of the AC synchronous motor and a field winding is provided on the rotor side
  • the rotor is excited by excitation of the field winding disposed on the rotor.
  • the rotor rotates in synchronization with the rotor field by applying three-phase alternating current to the stator.
  • An AC synchronous motor in which the rotor's electromagnet is replaced with a permanent magnet is called a permanent magnet motor, and a form in which the permanent magnet is buried inside the rotor is called an interior permanent magnet motor.
  • the embedded permanent magnet motor (motor) 60 can obtain a wide range of output from low speed to high speed rotation in combination with the field weakening control technique, as shown in Figs. It has a spatial asymmetry and is configured to increase torque density.
  • the motor 60 is integrally formed with a bracket 62 having a bolt through hole 621 formed under the motor housing 61 having the cooling fin 611 formed therein, and a coil 631 inside the motor housing 61. Hollow stator (63) wound around is coupled.
  • a rotor 65 coupled with a shaft 64 penetrated therein is inserted, and the shaft 64 exposed to both sides of the rotor 65 has bearings (both sides) of the motor housing 61. 661 is configured to be rotated in the stator 63 by the housing cap 66 is provided.
  • the rotor 65 is coupled to the spoke type in which a plurality of rotor pieces 653 each having a divided shape are formed on the outside of the rotor body 652 in which the shaft through hole 651 is formed, and the predetermined intervals are maintained. While the permanent magnet piece 654 is inserted between the rotor pieces 653 of the lower portion of the permanent magnet piece 654 is adhesively fixed to the rotor body 653 by a void or nonmagnetic material 656 It is configured to have.
  • the permanent magnet piece 653 has a weak mechanical strength, there is a problem that is broken or broken by a strong centrifugal force or impact, there is a problem that the permanent magnet is separated to the outside in the open structure of the rotor structure.
  • the present invention uses a magnetic piece made of ferrite with a high mechanical strength to distribute the load and stress concentration acting on the outer edge of the rotor piece by the centrifugal force generated in the permanent magnet piece in the process of rotating the rotor at high speed It is designed to prevent damage, and to prolong its life, while reducing the time and cost of inspection and repair.
  • the present invention provides a rotor core 10 through which a shaft insertion hole 11 is formed; A permanent magnet insertion groove 20 formed toward the shaft insertion hole 11 at the outer circumferential edge of the rotor core 10 and having a predetermined distance along the outer circumferential edge; And a permanent magnet piece 30 inserted into the permanent magnet insertion groove 20.
  • the permanent magnet insertion groove 20 has an open portion 21, the outer periphery of the rotor core 10 is open; Characterized in that it is formed of a dovetail portion 22 extending inwardly of the opening portion 21.
  • the opening portion 21 is formed with a locking protrusion 211 protruding inward in each open corner.
  • the permanent magnet piece 30 and the permanent magnet body 31; Inclined portions 311 are formed on both side surfaces of the permanent magnet body 31, and the inclined portion 311 is formed as a taper in which the outer lower end portion is extended, such as the permanent magnet insertion groove ⁇ 20.
  • the outer periphery between the permanent magnet insertion groove 20 and the other permanent magnet insertion groove 20 neighboring is characterized in that the curved portion 23 is formed to be convex outward.
  • the permanent magnet piece 30 is characterized in that the ferrite magnet of 3,900 ⁇ 4,500 Gauss of magnetic force made of manganese, cobalt, nickel oxide and iron.
  • the permanent magnet piece 30 may be made of neodium magnet.
  • the present invention has a permanent opening in the process of rotating the rotor at high speed by inserting a permanent magnet piece into a permanent magnet insertion groove formed to have an open portion opened along the outer periphery of the rotor core with a shaft insertion hole is formed to extend inwardly Due to the centrifugal force generated in the magnet piece, the load and stress concentration acting on the outer edge of the rotor piece can be distributed.
  • FIG. 1 is an exploded perspective view of a buried permanent magnet motor according to the prior art.
  • Figure 2 is a longitudinal sectional view of a buried permanent magnet motor according to the prior art.
  • Figure 3 is a perspective view of the embedded permanent magnet electric motor according to the present invention.
  • Figure 4 is an exploded perspective view of the embedded permanent magnet motor according to the present invention.
  • Figure 5 is a longitudinal sectional view of the embedded permanent magnet motor according to the present invention.
  • the rotor core 10 is rotatably coupled to the inside of the embedded permanent magnet motor 60 as shown in Figs. 3 and 4 of the motor housing 61 in which the cooling fin 611 is formed.
  • a bracket 62 having a bolt through hole 621 is formed at a lower portion thereof, and a stator 63 in which a coil 631 is wound is coupled to an inside of the motor housing 61.
  • the rotor core 10 which is the gist of the present invention, in which the shaft 64 is coupled to penetrate the inside of the stator 63, is inserted, and the shaft 64 exposed to both sides of the rotor core 10 is It is configured to be rotated in the stator 63 by the housing cap 66 provided with bearings 661 on both sides of the motor housing 61.
  • the rotor core 10 is formed to have a predetermined diameter, that is, a diameter smaller than the inner diameter of the stator 63, and is configured to prevent mutual interference from occurring during rotation, and has a shaft having a predetermined diameter in the center thereof.
  • the insertion hole 11 is formed to be penetrated so that the shaft 64 can be coupled in an interference fit form.
  • the permanent magnet insertion groove 20 is that the stress is generated by the permanent magnet piece 30 to be relaxed in the process of acting to the outside of the load due to the centrifugal force generated in the process of rotating at high speed while maintaining a constant interval that It is configured to provide a function to reduce.
  • the permanent magnet insertion groove 20 is formed to have a predetermined interval along the outer circumferential edge of the rotor core 10 toward the shaft insertion hole 11 from the outer circumferential edge of the rotor core 10.
  • the permanent magnet insertion groove 20 is formed with a dovetail portion 22 having a form in which the outer periphery of the rotor core 10 extends inwardly into the opening portion 21 having an open shape. That is, when the pressure or load to move the permanent magnet piece 30 to the outside by the centrifugal force acts, as the rotor core 10 by the dovetail portion 22 acts pressure or load to the inside It can prevent the separation. This can prevent the permanent magnet piece 30 from being pushed outward in the shape of a wedge.
  • the locking protrusions 211 having a shape protruding inwardly are formed to protrude inwardly at respective open corners of the opening part 21, so that both ends of the outer edges of the permanent magnet piece 30 are in contact with each other. As it is maintained, the permanent magnet piece 30 due to the centrifugal force can be prevented at the source.
  • the outer circumferential portion between the permanent magnet insertion groove 20 and another neighboring permanent magnet insertion groove 20 is formed with a convex curved portion 23 to the outside to increase the centrifugal force to increase the torque to prevent permanent magnet departure Even if the permanent magnet piece 30 inserted into the insertion groove 20 protrudes at a minute interval, the permanent magnet piece 30 can be prevented from coming into direct contact with the inner circumferential surface portion of the stator 63.
  • the permanent magnet piece 30 is inserted into the permanent magnet separation preventing insertion groove 20 is formed integrally with the inclined portion 311 inclined at a predetermined angle on both sides of the permanent magnet body 31.
  • the inclined portion 311 is formed of a taper in which the outer lower end portion is extended, such as the permanent magnet insertion groove 20, and when the centrifugal force is applied to the permanent magnet piece 30, the load due to the centrifugal force causes the inclined portion 311. As it is transmitted through the devtail portion 22 of the permanent magnet separation prevention insertion groove 20 through the load is distributed.
  • the permanent magnet piece 30 is preferably used as a ferrite magnet made of manganese, cobalt, nickel oxide and iron, but is not necessarily limited thereto, and may use a neodium magnet.
  • the magnetic force of the permanent magnet piece 30 is more preferably to have a magnetic force of 3,900 ⁇ 4,500 Gauss.
  • the embedded permanent magnet motor firstly rotates the rotor core 10 at a high speed in the stator 63 of the motor housing 61 and at the same time, the centrifugal force acts on the permanent magnet piece 30.
  • the centrifugal force acts on the permanent magnet piece 30 and at the same time the permanent magnet piece 30 is inserted in the outer direction, that is, toward the opening 21 formed at the outer edge of the rotor core 10. Try to get out of (20) and separate.
  • the permanent magnet separation preventing insertion groove 20 is formed to have a form widening to the inner lower portion, and the permanent magnet piece 30 is formed to have the same shape, the inclined portion formed on both sides of the permanent magnet body 31 As the 311 is pressed against the dovetail portion 22, the centrifugal force and the load by the centrifugal force are transmitted to the rotor core 10 and are dispersed.
  • the permanent magnet separation preventing insertion groove 20 It is possible to prevent the permanent magnet body 31 from being separated. At this time, as most of the load and stress generated by the centrifugal force is transmitted to the rotor core 10 through the dovetail portion 22 in advance, the load and stress acting directly on the locking protrusion 211 is maintained. By being reduced, it is possible to further prevent the jammed portion from being broken.
  • the present invention relates to a rotor of a buried permanent magnet electric motor having a permanent magnet separation preventing structure, and can be used in the field of permanent magnet electric motors.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Permanent Field Magnets Of Synchronous Machinery (AREA)

Abstract

The present invention relates to a rotor comprising: a rotor core having a shaft insertion hole penetrating therethrough; permanent magnet insertion grooves formed in the outer circumference of the rotor core toward the shaft insertion hole such that the permanent magnet insertion grooves have predetermined spacing along the outer circumference of the rotor core; and permanent magnet pieces inserted into the permanent magnet insertion grooves. Accordingly, the load and stress concentration acting on the outer edge of the rotor core by the centrifugal force generated by the permanent magnet pieces during the high-speed rotation of the rotor can be distributed, thus preventing the rotor from being partially broken and lengthening the lifespan of the rotor. Further, the permanent magnet pieces are made from ferrite having high mechanical strength so as to prevent same from being broken during the rotation of the rotor.

Description

영구자석 이탈방지 구조를 갖는 매립형 영구자석 전동기의 회전자Rotor of embedded permanent magnet motor with permanent magnet separation prevention structure
본 발명은 영구자석 이탈방지 구조를 갖는 매립형 영구자석 전동기의 회전자에 관한 것으로서, 특히 샤프트 삽입홀이 형성된 회전자 코어의 외주연부를 따라 오픈된 개방부를 가지며 내측으로 확장된 형태를 갖도록 형성된 영구자석 삽입홈에 영구자석편이 삽입되도록 한 것이다.The present invention relates to a rotor of a buried permanent magnet motor having a permanent magnet separation prevention structure, and in particular, a permanent magnet formed to have an open portion extended along an outer periphery of the rotor core in which a shaft insertion hole is formed and to have an inwardly expanded form. Permanent magnet piece is inserted into the insertion groove.
일반적으로 교류 전동기는 교류 유도 모터와 교류 동기 모터로 구분되어지고, 교류 동기 모터 중 고정자측에 전기자 권선이 회전자측에 계자 권선이 구비된 경우에는 회전자에 배치한 계자 권선을 여자하여 회전자가 가 전자석으로 되고, 고정자에 3상 교류를 인가하여 회전자계에 동기하여 회전자가 회전하게 된다.In general, an AC motor is classified into an AC induction motor and an AC synchronous motor. When an armature winding is provided on the stator side of the AC synchronous motor and a field winding is provided on the rotor side, the rotor is excited by excitation of the field winding disposed on the rotor. Becomes an electromagnet, and the rotor rotates in synchronization with the rotor field by applying three-phase alternating current to the stator.
회전자의 전자석이 영구자석으로 치환된 형태의 교류 동기 모터를 영구자석 모터라하고, 영구자석이 회전자의 내부에 묻혀 있는 형태를 매립형 영구 자석 모터(Interior Permanent Magnet Motor)라 한다.An AC synchronous motor in which the rotor's electromagnet is replaced with a permanent magnet is called a permanent magnet motor, and a form in which the permanent magnet is buried inside the rotor is called an interior permanent magnet motor.
매립형 영구자석 모터(전동기)(60)는 도1 및 도2에 도시된 바와 같이, 약계자 제어 기술과의 조합으로 저속에서 고속 회전까지 광범위하게 출력을 얻는 것이 가능하고, 공극 방향에 대해 인덕턴스의 공간적인 비대칭성을 가지고 있어 토크 밀도를 높일 수 있도록 구성되어 있다.The embedded permanent magnet motor (motor) 60 can obtain a wide range of output from low speed to high speed rotation in combination with the field weakening control technique, as shown in Figs. It has a spatial asymmetry and is configured to increase torque density.
이러한 전동기(60)는 냉각핀(611)이 형성된 전동기 하우징(61)의 하부에 볼트관통홀(621)이 형성된 브라켓(62)이 일체로 형성되고, 전동기 하우징(61)의 내부에 코일(631)이 권취된 중공형태의 고정자(63)가 결합되어 있다.The motor 60 is integrally formed with a bracket 62 having a bolt through hole 621 formed under the motor housing 61 having the cooling fin 611 formed therein, and a coil 631 inside the motor housing 61. Hollow stator (63) wound around is coupled.
고정자(63)의 내부에는 샤프트(64)가 관통되게 결합된 회전자(65)가 삽입되고, 회전자(65)의 양측으로 노출된 샤프트(64)는 전동기 하우징(61)의 양측으로 베어링(661)이 구비된 하우징캡(66)에 의하여 고정자(63)의 내부에서 회전 될 수 있도록 구성되어 있다.Inside the stator 63, a rotor 65 coupled with a shaft 64 penetrated therein is inserted, and the shaft 64 exposed to both sides of the rotor 65 has bearings (both sides) of the motor housing 61. 661 is configured to be rotated in the stator 63 by the housing cap 66 is provided.
회전자(65)는 축관통홀(651)이 형성된 회전자몸체(652)의 외부에 각각 분할된 형태를 갖는 다수개의 회전자편(653)이 일정한 간격이 유지된 스포크 타입으로 결합되고, 각각의 회전자편(653) 사이에 영구자석편(654)이 삽입된 가운데 영구자석편(654)의 하부가 공극 또는 비자성물질체(656)로 회전자몸체(653)에 접착 고정된 형태를 갖도록 구성되어 있다.The rotor 65 is coupled to the spoke type in which a plurality of rotor pieces 653 each having a divided shape are formed on the outside of the rotor body 652 in which the shaft through hole 651 is formed, and the predetermined intervals are maintained. While the permanent magnet piece 654 is inserted between the rotor pieces 653 of the lower portion of the permanent magnet piece 654 is adhesively fixed to the rotor body 653 by a void or nonmagnetic material 656 It is configured to have.
그러나 회전자(65)가 고속으로 회전되는 과정에서 영구자석편(654)에 발생되는 원심력에 의하여 회전자편(653)의 외측 모서리 부분으로 하중에 따른 응력이 집중되어 회전자편(653)의 모서리부분이 파손됨과 동시에 영구자석편(654)이 분리되는 문제점이 있었다.However, due to the centrifugal force generated in the permanent magnet piece 654 in the process of rotating the rotor 65 at high speed, the stress according to the load is concentrated to the outer edge portion of the rotor piece 653 so that the rotor piece 653 There was a problem that the permanent magnet piece 654 is separated at the same time the edge is broken.
또한, 영구자석편(653)이 기계적 강도가 약하여 강한 원심력이나 충격에 의하여 깨지거나 파손되는 문제점이 있었고, 오픈된 개방 구조의 회전자 구조에서는 영구자석이 외부로 이탈되는 문제점이 있었다.In addition, the permanent magnet piece 653 has a weak mechanical strength, there is a problem that is broken or broken by a strong centrifugal force or impact, there is a problem that the permanent magnet is separated to the outside in the open structure of the rotor structure.
이러한 문제점으로 인하여 수명이 단축됨과 동시에 파손시 점검이나 수리로 인한 시간과 비용이 추가적으로 지출되는 또 다른 문제점이 있었다.Due to these problems, the service life was shortened, and another problem was that additional time and money were spent due to inspection or repair in case of breakage.
본 발명은 회전자가 고속으로 회전되는 과정에서 영구자석편에 발생되는 원심력에 의하여 회전자편의 외측 모서리에 작용하는 하중과 응력집중이 분산될 수 있도록 하는 가운데 기계적 강도가 강한 페라이트로 이루어진 마그네틱편이 사용되어지도록 하여 파손되는 것을 방지할 수 있도록 하고, 이를 통해 수명을 연장시킴과 동시에 점검이나 수리로 인한 시간과 비용을 줄일 수 있도록 한 것이다.The present invention uses a magnetic piece made of ferrite with a high mechanical strength to distribute the load and stress concentration acting on the outer edge of the rotor piece by the centrifugal force generated in the permanent magnet piece in the process of rotating the rotor at high speed It is designed to prevent damage, and to prolong its life, while reducing the time and cost of inspection and repair.
본 발명은 샤프트 삽입홀(11)이 관통되게 형성된 회전자 코어(10)와; 상기 회전자 코어(10)의 외주연부에서 샤프트 삽입홀(11)을 향하며, 외주연부를 따라 일정간격을 갖도록 형성된 영구자석 삽입홈(20); 및 상기 영구자석 삽입홈(20)에 삽입된 영구자석편(30)으로 구성됨을 특징으로 한다.The present invention provides a rotor core 10 through which a shaft insertion hole 11 is formed; A permanent magnet insertion groove 20 formed toward the shaft insertion hole 11 at the outer circumferential edge of the rotor core 10 and having a predetermined distance along the outer circumferential edge; And a permanent magnet piece 30 inserted into the permanent magnet insertion groove 20.
또한, 상기 영구자석 삽입홈(20)은 회전자 코어(10)의 외주연부가 오픈된 개방부(21)와; 상기 개방부(21)의 내측으로 확장되는 더브테일부(22)로 형성됨을 특징으로 한다.In addition, the permanent magnet insertion groove 20 has an open portion 21, the outer periphery of the rotor core 10 is open; Characterized in that it is formed of a dovetail portion 22 extending inwardly of the opening portion 21.
또한, 상기 개방부(21)는 개방된 각각의 모서리에 내측으로 돌출된 걸림돌부(211)가 형성됨을 한다.In addition, the opening portion 21 is formed with a locking protrusion 211 protruding inward in each open corner.
또한, 상기 영구자석편(30)은 영구자석 몸체(31)와; 상기 영구자석 몸체(31)의 양측면에 경사부(311)가 형성되되, 상기 경사부(311)는 영구자석 삽입홈ㅋ(20)과 같이 외측 하단부가 확장되는 테이퍼로 형성됨을 특징으로 한다.In addition, the permanent magnet piece 30 and the permanent magnet body 31; Inclined portions 311 are formed on both side surfaces of the permanent magnet body 31, and the inclined portion 311 is formed as a taper in which the outer lower end portion is extended, such as the permanent magnet insertion groove ㅋ 20.
또한, 상기 영구자석 삽입홈(20)과 이웃하는 다른 영구자석 삽입홈(20) 사이의 외주연부는 외측으로 볼록한 만곡부(23)가 형성됨을 특징으로 한다.In addition, the outer periphery between the permanent magnet insertion groove 20 and the other permanent magnet insertion groove 20 neighboring is characterized in that the curved portion 23 is formed to be convex outward.
그리고 상기 영구자석편(30)은 망간, 코발트, 니켈의 산화물과 철로 이루어진 3,900~4,500Gauss의 자력의 페라이트자석으로 이루어짐을 특징으로 한다.The permanent magnet piece 30 is characterized in that the ferrite magnet of 3,900 ~ 4,500 Gauss of magnetic force made of manganese, cobalt, nickel oxide and iron.
또한, 상기 영구자석편(30)은 네오듐자석으로 이루어질 수도 있다.In addition, the permanent magnet piece 30 may be made of neodium magnet.
본 발명은 샤프트 삽입홀이 형성된 회전자 코어의 외주연부를 따라 오픈된 개방부를 가지며 내측으로 확장된 형태를 갖도록 형성된 영구자석 삽입홈에 영구자석편이 삽입되도록 함으로써, 회전자가 고속으로 회전되는 과정에서 영구자석편에 발생되는 원심력에 의하여 회전자편의 외측 모서리에 작용하는 하중과 응력집중이 분산될 수 있는 효과를 얻을 수 있다.The present invention has a permanent opening in the process of rotating the rotor at high speed by inserting a permanent magnet piece into a permanent magnet insertion groove formed to have an open portion opened along the outer periphery of the rotor core with a shaft insertion hole is formed to extend inwardly Due to the centrifugal force generated in the magnet piece, the load and stress concentration acting on the outer edge of the rotor piece can be distributed.
그리고 이를 통해 전체적으로 수명을 연장시킴으로써, 점검이나 수리로 인한 시간과 비용의 지출을 줄일 수 있는 효과를 더 얻을 수 있다.This extends the overall lifespan, further reducing the time and money spent on inspections and repairs.
도1은 종래 기술에 따른 매립형 영구자석 전동기의 분해 사시도.1 is an exploded perspective view of a buried permanent magnet motor according to the prior art.
도2는 종래 기술에 따른 매립형 영구자석 전동기의 종단면도.Figure 2 is a longitudinal sectional view of a buried permanent magnet motor according to the prior art.
도3은 본 발명에 따른 매립형 영구자석 전동기의 사시도.Figure 3 is a perspective view of the embedded permanent magnet electric motor according to the present invention.
도4는 본 발명에 따른 매립형 영구자석 전동기의 분해 사시도.Figure 4 is an exploded perspective view of the embedded permanent magnet motor according to the present invention.
도5는 본 발명에 따른 매립형 영구자석 전동기의 종단면도.Figure 5 is a longitudinal sectional view of the embedded permanent magnet motor according to the present invention.
본 발명의 실시예를 첨부 도면을 참조하여 설명하면 다음과 같다.An embodiment of the present invention will be described with reference to the accompanying drawings.
본 발명에 따른 영구자석 이탈방지 구조를 갖는 매립형 영구자석 전동기의 회전자는 도3 내지 도5에 도시된 바와 같이, 회전자 코어(10), 영구자석 삽입홈(20) 및 영구자석편(30)으로 구성되고, 종래와 동일한 구성에 대해서는 동일 부호를 사용하기로 한다.The rotor of the embedded permanent magnet motor having a permanent magnet separation prevention structure according to the present invention, as shown in Figures 3 to 5, the rotor core 10, the permanent magnet insertion groove 20 and the permanent magnet piece 30 The same reference numerals will be used for the same configurations as the prior art.
여기에서, 상기 회전자 코어(10)는 도3 및 도4에 도시된 바와 같은 매립형 영구자석 전동기(60)의 내부에 회전 가능하게 결합된 것으로 냉각핀(611)이 형성된 전동기 하우징(61)의 하부에 볼트관통홀(621)이 형성된 브라켓(62)이 형성되고, 전동기 하우징(61)의 내부에 코일(631)이 권취된 고정자(63)가 결합되어 있다.Here, the rotor core 10 is rotatably coupled to the inside of the embedded permanent magnet motor 60 as shown in Figs. 3 and 4 of the motor housing 61 in which the cooling fin 611 is formed. A bracket 62 having a bolt through hole 621 is formed at a lower portion thereof, and a stator 63 in which a coil 631 is wound is coupled to an inside of the motor housing 61.
상기 고정자(63)의 내부에는 샤프트(64)가 관통되게 결합된 본 발명의 요지인 상기 회전자 코어(10)가 삽입되고, 상기 회전자 코어(10)의 양측으로 노출된 샤프트(64)는 전동기 하우징(61)의 양측으로 베어링(661)이 구비된 하우징캡(66)에 의하여 고정자(63)의 내부에서 회전 될 수 있도록 구성되어 있다.The rotor core 10, which is the gist of the present invention, in which the shaft 64 is coupled to penetrate the inside of the stator 63, is inserted, and the shaft 64 exposed to both sides of the rotor core 10 is It is configured to be rotated in the stator 63 by the housing cap 66 provided with bearings 661 on both sides of the motor housing 61.
상기 회전자 코어(10)는 소정 직경 즉, 고정자(63)의 내경 보다 적은 직경을 갖도록 형성되어 회전되는 과정에서 상호 간섭이 발생되는 것을 방지할 수 있게 구성되어 있고, 중앙에는 소정 직경을 갖는 샤프트 삽입홀(11)이 관통되게 형성되어 샤프트(64)가 억지끼워맞춤 형태로 결합될 수 있도록 구성되어 있다.The rotor core 10 is formed to have a predetermined diameter, that is, a diameter smaller than the inner diameter of the stator 63, and is configured to prevent mutual interference from occurring during rotation, and has a shaft having a predetermined diameter in the center thereof. The insertion hole 11 is formed to be penetrated so that the shaft 64 can be coupled in an interference fit form.
상기 영구자석 삽입홈(20)은 영구자석편(30)이 일정한 간격이 유지되도록 하는 가운데 고속으로 회전되는 과정에서 발생되는 원심력에 의한 하중이 외측으로 작용되는 과정에서 완화되도록 하여 응력이 발생되는 것을 줄일 수 있는 기능이 제공될 수 있도록 구성되어 있다.The permanent magnet insertion groove 20 is that the stress is generated by the permanent magnet piece 30 to be relaxed in the process of acting to the outside of the load due to the centrifugal force generated in the process of rotating at high speed while maintaining a constant interval that It is configured to provide a function to reduce.
이를 위해, 상기 영구자석 삽입홈(20)은 상기 회전자 코어(10)의 외주연부에서 샤프트 삽입홀(11)을 향하도록 하는 가운데 외주연부를 따라 일정간격을 갖도록 형성되어 있다.To this end, the permanent magnet insertion groove 20 is formed to have a predetermined interval along the outer circumferential edge of the rotor core 10 toward the shaft insertion hole 11 from the outer circumferential edge of the rotor core 10.
상기 영구자석 삽입홈(20)은 회전자 코어(10)의 외주연부가 오픈된 형태를 갖는 개방부(21) 내측으로 내측방향으로 확장되는 형태를 갖는 더브테일부(22)가 형성되어 있다. 즉, 원심력에 의하여 영구자석편(30)이 외측으로 이동하려는 압력이나 하중이 작용하게 될 경우, 더브테일부(22)에 의하여 회전자 코어(10)이 내측으로 압력이나 하중이 작용하게 됨에 따라 분리되는 것을 방지할 수 있게 된다. 이는 쐐기형태로 영구자석편(30)이 외측으로 밀려나는 것을 방지할 수 있게 된다.The permanent magnet insertion groove 20 is formed with a dovetail portion 22 having a form in which the outer periphery of the rotor core 10 extends inwardly into the opening portion 21 having an open shape. That is, when the pressure or load to move the permanent magnet piece 30 to the outside by the centrifugal force acts, as the rotor core 10 by the dovetail portion 22 acts pressure or load to the inside It can prevent the separation. This can prevent the permanent magnet piece 30 from being pushed outward in the shape of a wedge.
상기 개방부(21)의 개방된 각각의 모서리에 내측에는 내측방향으로 돌출되는 형태를 갖는 걸림돌부(211)가 돌출되도록 형성되어 평상시 영구자석편(30)의 외측 모서리 양측단부가 각각 맞대어진 상태가 유지됨에 따라원심력에 의한 영구자석편(30)이 외측으로 이동될 수 있도록 하는 것을 원천적으로 방지할 수 있게 된다.The locking protrusions 211 having a shape protruding inwardly are formed to protrude inwardly at respective open corners of the opening part 21, so that both ends of the outer edges of the permanent magnet piece 30 are in contact with each other. As it is maintained, the permanent magnet piece 30 due to the centrifugal force can be prevented at the source.
상기 영구자석 삽입홈(20)과 이웃하는 다른 영구자석 삽입홈(20) 사이의 외주연부는 외측으로 볼록한 만곡부(23)가 형성되어 원심력을 크게 하여 토크가 증대될 수 있도록 하는 가운데 영구자석 이탈 방지 삽입홈(20)에 삽입된 영구자석편(30)이 미소한 간격으로 돌출되더라도 고정자(63)의 내주면부와 직접적으로 접촉되는 것을 방지할 수 있게 된다.The outer circumferential portion between the permanent magnet insertion groove 20 and another neighboring permanent magnet insertion groove 20 is formed with a convex curved portion 23 to the outside to increase the centrifugal force to increase the torque to prevent permanent magnet departure Even if the permanent magnet piece 30 inserted into the insertion groove 20 protrudes at a minute interval, the permanent magnet piece 30 can be prevented from coming into direct contact with the inner circumferential surface portion of the stator 63.
상기 영구자석편(30)은 영구자석 이탈방지 삽입홈(20)에 삽입된 것으로 영구자석 몸체(31)의 양측면에 소정 각도로 기울어지는 경사부(311)가 일체로 형성되어 있다. 상기 경사부(311)는 영구자석 삽입홈(20)과 같이 외측 하단부가 확장되는 테이퍼로 형성되어 영구자석편(30)에 원심력이 작용하게 될 경우, 원심력에 의한 하중이 경사부(311)를 통해 영구자석 이탈방지 삽입홈(20)의 데브테일부(22)를 통해 전달됨에 따라 하중이 분산되게 된다.The permanent magnet piece 30 is inserted into the permanent magnet separation preventing insertion groove 20 is formed integrally with the inclined portion 311 inclined at a predetermined angle on both sides of the permanent magnet body 31. The inclined portion 311 is formed of a taper in which the outer lower end portion is extended, such as the permanent magnet insertion groove 20, and when the centrifugal force is applied to the permanent magnet piece 30, the load due to the centrifugal force causes the inclined portion 311. As it is transmitted through the devtail portion 22 of the permanent magnet separation prevention insertion groove 20 through the load is distributed.
이러한 영구자석편(30)은 망간, 코발트, 니켈의 산화물과 철로 이루어진 페라이트(Ferrite)자석으로 사용하는 것이 바람직하나, 반드시 이에 한정되는 것은 아니며 네오듐 자석을 사용할 수도 있다. 한편, 영구자석편(30)의 자력은 3,900~4,500Gauss의 자력을 갖도록 하는 것이 더욱 바람직하다.The permanent magnet piece 30 is preferably used as a ferrite magnet made of manganese, cobalt, nickel oxide and iron, but is not necessarily limited thereto, and may use a neodium magnet. On the other hand, the magnetic force of the permanent magnet piece 30 is more preferably to have a magnetic force of 3,900 ~ 4,500 Gauss.
이와 같은 매립형 영구자석 전동기는 먼저, 전동기 하우징(61)의 고정자(63) 내부에서 회전자 코어(10)가 고속으로 회전함과 동시에 원심력이 영구자석편(30)에 작용하게 된다.The embedded permanent magnet motor firstly rotates the rotor core 10 at a high speed in the stator 63 of the motor housing 61 and at the same time, the centrifugal force acts on the permanent magnet piece 30.
다음, 원심력이 영구자석편(30)에 작용하게 됨과 동시에 영구자석편(30)이 외측방향 즉, 회전자 코어(10)의 외부연부에 형성된 개방부(21)를 향하여 영구자석 이탈방지 삽입홈(20)으로부터 빠져 나와 분리되려고 한다. 이때, 영구자석 이탈방지 삽입홈(20)이 내측 하부로 넓어지는 형태를 갖도록 형성되고, 영구자석편(30)이 동일한 형태를 갖도록 형성되어짐으로써, 영구자석 몸체(31)의 양측에 형성된 경사부(311)가 더브테일부(22)에 맞대어져 가압됨에 따라 원심력과 원심력에 의한 하중이 회전자 코어(10)로 전달되면서 분산된다.Next, the centrifugal force acts on the permanent magnet piece 30 and at the same time the permanent magnet piece 30 is inserted in the outer direction, that is, toward the opening 21 formed at the outer edge of the rotor core 10. Try to get out of (20) and separate. At this time, the permanent magnet separation preventing insertion groove 20 is formed to have a form widening to the inner lower portion, and the permanent magnet piece 30 is formed to have the same shape, the inclined portion formed on both sides of the permanent magnet body 31 As the 311 is pressed against the dovetail portion 22, the centrifugal force and the load by the centrifugal force are transmitted to the rotor core 10 and are dispersed.
이러한 과정에서 영구자석 몸체(31)의 경사부(311) 끝단부의 모서리가 개방부(21)의 양측 모서리에 형성된 걸림돌부(211)에 맞대어진 상태로 걸림에 따라 영구자석 이탈방지 삽입홈(20)으로부터 영구자석 몸체(31)가 분리되는 것을 방지할 수 있게 된다. 이때, 원심력에 의하여 발생된 대부분의 하중과 응력이 미리 더브테일부(22)를 통해 회전자 코어(10)로 전달된 상태가 유지됨에 따라 걸림돌부(211)에 직접적으로 작용하는 하중과 응력이 줄어들게 됨으로써, 걸려진 부분이 파손되는 것을 더 방지할 수 있게 된다. In this process, as the edges of the end portions of the inclined portion 311 of the permanent magnet body 31 are engaged with the engaging protrusions 211 formed at both edges of the opening portion 21, the permanent magnet separation preventing insertion groove 20 It is possible to prevent the permanent magnet body 31 from being separated. At this time, as most of the load and stress generated by the centrifugal force is transmitted to the rotor core 10 through the dovetail portion 22 in advance, the load and stress acting directly on the locking protrusion 211 is maintained. By being reduced, it is possible to further prevent the jammed portion from being broken.
상술한 상세한 설명은 본 발명의 이해를 돕기 위한 일 실시예에 불과하므로 본 발명의 권리범위 내지 기술적 범위가 상기 설명된 바에 한정하는 것으로 이해되어서는 안 된다. 본 발명의 권리범위 내지 기술적 범위는 후술하는 특허청구범위 및 그 균등범위에 의해 정하여진다.The above detailed description is only an embodiment for better understanding of the present invention, and thus the scope of the present invention should not be understood as being limited to the above-described scope. The scope of the invention to the technical scope is defined by the claims and equivalents described below.
본 발명은 영구자석 이탈방지 구조를 갖는 매립형 영구자석 전동기의 회전자에 관한 것으로서, 영구자석 전동기 분야에 이용가능하다.BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rotor of a buried permanent magnet electric motor having a permanent magnet separation preventing structure, and can be used in the field of permanent magnet electric motors.

Claims (7)

  1. 샤프트 삽입홀(11)이 관통되게 형성된 회전자 코어(10)와;A rotor core 10 formed to penetrate the shaft insertion hole 11;
    상기 회전자 코어(10)의 외주연부에서 샤프트 삽입홀(11)을 향하며, 외주연부를 따라 일정간격을 갖도록 형성된 영구자석 삽입홈(20); 및A permanent magnet insertion groove 20 formed toward the shaft insertion hole 11 at the outer circumferential edge of the rotor core 10 and having a predetermined distance along the outer circumferential edge; And
    상기 영구자석 삽입홈(20)에 삽입된 영구자석편(30)으로 구성됨을 특징으로 하는 영구자석 이탈방지 구조를 갖는 매립형 영구자석 전동기의 회전자.The rotor of the embedded permanent magnet motor having a permanent magnet separation prevention structure, characterized in that consisting of a permanent magnet piece 30 inserted into the permanent magnet insertion groove (20).
  2. 제1항에 있어서,The method of claim 1,
    상기 영구자석 삽입홈(20)은 회전자 코어(10)의 외주연부가 오픈된 개방부(21)와;The permanent magnet insertion groove 20 includes an opening 21 in which the outer periphery of the rotor core 10 is opened;
    상기 개방부(21)의 내측으로 확장되는 더브테일부(22)로 형성됨을 특징으로 하는 영구자석 이탈방지 구조를 갖는 매립형 영구자석 전동기의 회전자.The rotor of the embedded permanent magnet motor having a permanent magnet separation prevention structure, characterized in that formed by the dovetail portion 22 extending inwardly of the opening portion (21).
  3. 제2항에 있어서,The method of claim 2,
    상기 개방부(21)는 개방된 각각의 모서리에 내측으로 돌출된 걸림돌부(211)가 형성됨을 하는 영구자석 이탈방지 구조를 갖는 매립형 영구자석 전동기의 회전자.The opening portion 21 is a rotor of the embedded permanent magnet motor having a permanent magnet separation prevention structure is formed in each of the open corners protruding inwardly projecting protrusions (211).
  4. 제1항에 있어서,The method of claim 1,
    상기 영구자석편(30)은 영구자석 몸체(31)와;The permanent magnet piece 30 and the permanent magnet body 31;
    상기 영구자석 몸체(31)의 양측면에 경사부(311)가 형성되되, 상기 경사부(311)는 영구자석 삽입홈ㅋ(20)과 같이 외측 하단부가 확장되는 테이퍼로 형성됨을 특징으로 하는 영구자석 이탈방지 구조를 갖는 매립형 영구자석 전동기의 회전자.The inclined portion 311 is formed on both sides of the permanent magnet body 31, the inclined portion 311 is a permanent magnet characterized in that it is formed of a tapered to extend the outer lower end, such as the permanent magnet insertion groove (20) Rotor of embedded permanent magnet motor having anti-separation structure.
  5. 제1항에 있어서,The method of claim 1,
    상기 영구자석 삽입홈(20)과 이웃하는 다른 영구자석 삽입홈(20) 사이의 외주연부는 외측으로 볼록한 만곡부(23)가 형성됨을 특징으로 하는 영구자석 이탈방지 구조를 갖는 매립형 영구자석 전동기의 회전자.The outer circumferential portion between the permanent magnet insertion groove 20 and another neighboring permanent magnet insertion groove 20 is formed in the outer convex curved portion 23 of the embedded permanent magnet electric motor having a permanent magnet departure prevention structure, characterized in that formed Electronic.
  6. 제1항에 있어서,The method of claim 1,
    상기 영구자석편(30)은 망간, 코발트, 니켈의 산화물과 철로 이루어진 3,900~4,500Gauss의 자력을 갖는 페라이트자석으로 이루어짐을 특징으로 하는 영구자석 이탈방지 구조를 갖는 매립형 영구자석 전동기의 회전자.The permanent magnet piece 30 is a rotor of a buried permanent magnet motor having a permanent magnet separation prevention structure, characterized in that consisting of a ferrite magnet having a magnetic force of 3,900 ~ 4,500 Gauss made of manganese, cobalt, nickel oxide and iron.
  7. 제1항에 있어서,The method of claim 1,
    상기 영구자석편(30)은 네오듐자석으로 이루어짐을 특징으로 하는 영구자석 이탈방지 구조를 갖는 매립형 영구자석 전동기의 회전자.The permanent magnet piece 30 is a rotor of a buried permanent magnet motor having a permanent magnet separation prevention structure, characterized in that made of neodymium magnets.
PCT/KR2013/012313 2012-12-28 2013-12-27 Rotor of interior permanent magnet motor having structure for preventing permanent magnet from escaping WO2014104819A1 (en)

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EP3925057A4 (en) * 2019-03-19 2022-06-22 Magna International Inc High performance electromagnetic machine and cooling system

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US20040150283A1 (en) * 2003-01-31 2004-08-05 Calfo Raymond Mark Trapezoidal shaped magnet flux intensifier motor pole arrangement for improved motor torque density
KR20090017005A (en) * 2007-08-13 2009-02-18 삼성전자주식회사 Rotor of motor and manufacturing method thereof
JP2011217601A (en) * 2010-03-31 2011-10-27 Valeo Equipments Electriques Moteur Flux concentration type synchronous rotating electric machine with permanent magnet
KR101200260B1 (en) * 2011-05-06 2012-11-12 한양대학교 산학협력단 Spoke type permanent magnet motor

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Publication number Priority date Publication date Assignee Title
US20040150283A1 (en) * 2003-01-31 2004-08-05 Calfo Raymond Mark Trapezoidal shaped magnet flux intensifier motor pole arrangement for improved motor torque density
KR20090017005A (en) * 2007-08-13 2009-02-18 삼성전자주식회사 Rotor of motor and manufacturing method thereof
JP2011217601A (en) * 2010-03-31 2011-10-27 Valeo Equipments Electriques Moteur Flux concentration type synchronous rotating electric machine with permanent magnet
KR101200260B1 (en) * 2011-05-06 2012-11-12 한양대학교 산학협력단 Spoke type permanent magnet motor

Cited By (1)

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Publication number Priority date Publication date Assignee Title
EP3925057A4 (en) * 2019-03-19 2022-06-22 Magna International Inc High performance electromagnetic machine and cooling system

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