KR20090007050A - The rotor structure for line start permanent magnet synchronous motor - Google Patents

The rotor structure for line start permanent magnet synchronous motor Download PDF

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Publication number
KR20090007050A
KR20090007050A KR1020070070655A KR20070070655A KR20090007050A KR 20090007050 A KR20090007050 A KR 20090007050A KR 1020070070655 A KR1020070070655 A KR 1020070070655A KR 20070070655 A KR20070070655 A KR 20070070655A KR 20090007050 A KR20090007050 A KR 20090007050A
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South Korea
Prior art keywords
rotor
synchronous motor
permanent magnet
slot
skew
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KR1020070070655A
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Korean (ko)
Inventor
임태빈
유병강
남윤호
안정호
송혁진
김홍석
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(주)모터넷 인터내셔날
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Priority to KR1020070070655A priority Critical patent/KR20090007050A/en
Publication of KR20090007050A publication Critical patent/KR20090007050A/en

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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
    • H02K1/246—Variable reluctance rotors
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K1/00—Details of the magnetic circuit
    • H02K1/06—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
    • H02K21/00—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets
    • H02K21/46—Motors having additional short-circuited winding for starting as an asynchronous motor
    • 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
    • H02K29/03—Motors or generators having non-mechanical commutating devices, e.g. discharge tubes or semiconductor devices with a magnetic circuit specially adapted for avoiding torque ripples or self-starting problems
    • 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
    • H02K2201/06—Magnetic cores, or permanent magnets characterised by their skew

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

Abstract

A rotor structure of single phase induction start type synchronous motor is provided to reduce slot harmonic generated in starting by forming skew in a squirrel cage conductor bar of a rotor. A rotor structure of single phase induction start type synchronous motor comprises a slot, a permanent magnet(3), and an aluminum conductor(4). A skew is formed in a slot in which a squirrel cage conductor bar of a rotor is used, and is not formed in a part in which a permanent magnet is mounted for synchronous operation. A skew angle of a rotor slot is 5°~30°. A mounting type permanent magnet is coupled with four surfaces of the aluminum conductor inside the slot.

Description

단상 유도 기동형 동기전동기의 회전자 구조 {The Rotor Structure for Line Start Permanent Magnet Synchronous Motor}The Rotor Structure for Line Start Permanent Magnet Synchronous Motor

도 1은 종래 동기전동기의 회전자 구조를 나타내는 사시도.1 is a perspective view showing a rotor structure of a conventional synchronous motor.

도 2는 도 1의 단면도.2 is a cross-sectional view of FIG.

도 3은 도 1의 상면도.3 is a top view of FIG. 1.

도 4는 본 발명의 동기전동기 회전자 구조를 나타내는 사시도.4 is a perspective view showing a synchronous motor rotor structure of the present invention.

도 5는 도 4의 단면도.5 is a cross-sectional view of FIG. 4.

도 6은 도 4의 상면도.6 is a top view of FIG. 4.

<도면의 주요부분에 대한 부호의 설명><Description of the symbols for the main parts of the drawings>

1 : 회전자 2 : 슬립(slip) 1: Rotor 2: Slip

3 : 영구자석 4 : 알루미늄 도체3: permanent magnet 4: aluminum conductor

5 : 스큐된 슬롯5: skewed slot

본 발명은 단상 유도 기동형 동기전동기의 회전자 구조에 관한 것이다. 더욱 상세하게는 단상 유도 전동기로 기동을 하고, 영구자석의 의해 동기운전을 하는 전동기의 회전자 구조로 기동을 위한 유도 자계 형성을 위하여 동기전동기의 회전자의 농형 도체바가 사용되는 부분에만 스큐(Skew)를 주고, 동기운전을 위한 영구자석이 매입되는 부분에는 스큐를 주지 않는 회전자 구조를 갖는 것을 특징으로 한다. The present invention relates to a rotor structure of a single phase induction start type synchronous motor. More specifically, a skew (Skew) is used only in the part where the squirrel conductor bar of the synchronous motor is used to form an induction magnetic field for starting by the rotor structure of the motor that starts with a single-phase induction motor and performs synchronous operation by a permanent magnet. ) And a rotor structure that does not give a skew to a portion in which the permanent magnet for synchronous operation is embedded.

종래의 단상 유도 기동형 동기 전동기는 정속 운전을 하는 단상 전원용 교류 모터로서, 유도 전동기와 동기 전동기의 혼합 형태이다. 단상 유도 기동형 동기 전동기는 권선에 인가된 교류전원에 의해 회전자계를 형성하는 고정자와, 이 고정자 내부에 위치되어 고정자에 의해 형성된 회전자계에 의해 회전하는 회전자로 이루어진다. The conventional single phase induction starting type synchronous motor is an AC motor for a single phase power supply for constant speed operation, and is a mixed form of an induction motor and a synchronous motor. The single-phase induction starting synchronous motor is composed of a stator for forming a magnetic field by an AC power source applied to a winding, and a rotor located inside the stator and rotating by a magnetic field formed by the stator.

이때, 이 단상 유도 기동형 동기 전동기는 고정자의 자속이 회전자를 통과할 때 릴럭턴스(자기저항)가 작아지는 방향으로 회전자가 이동할 때의 회전력과 매입되어 있는 영구자석의 자력에 의하여 생성되는 토크를 이용하여 구동되는 전동기 이다. At this time, this single-phase induction starting synchronous motor generates torque generated by the rotational force when the rotor moves in the direction of decreasing reluctance (magnetic resistance) when the magnetic flux of the stator passes through the rotor and the magnetic force of the embedded permanent magnet. It is an electric motor driven by.

즉, 기동 시에는 유도 전동기와 같이 고정자 자속 변화와 이에 의해 도체 바에 유기되는 전류와의 상호작용에 의해 기동 토크가 생성되어, 회전되기 시작하고, 기동 후에는 고정자의 자속이 회전자 내부의 코어 부분으로만 흐르려고 하는 릴럭턴스 토크와 영구자석의 자력을 활용하여 정속으로 회전한다.That is, during start-up, starting torque is generated and rotated by the interaction of the stator flux with the induction motor and the current induced in the conductor bar, and starts to rotate. It rotates at constant speed by using the reluctance torque that tries to flow only and the magnetic force of the permanent magnet.

도 1은 종래 동기전동기의 회전자 구조를 나타내는 사시도이고, 도 2는 도 1의 단면도이고, 도 3은 도 1의 상면도이다. 1 is a perspective view illustrating a rotor structure of a conventional synchronous motor, FIG. 2 is a cross-sectional view of FIG. 1, and FIG. 3 is a top view of FIG. 1.

도 1에 의하면, 종래의 단상 유도 기동형 동기 전동기는 회전자(1)의 농형 도체바 부분인 슬롯(2)이 직선으로 이루어져 있다. 도 2에 의하면 회전자(1)는 슬롯(2)의 안쪽은 알루미늄 도체(4)의 4면에 매입형 영구자석(3 : magnet)이 삽입되어 결합된 구조를 갖는다. According to Fig. 1, the conventional single phase induction starting type synchronous motor has a slot 2, which is a portion of a cage conductor bar of the rotor 1, in a straight line. According to FIG. 2, the rotor 1 has a structure in which an embedded permanent magnet 3 is inserted into four surfaces of the aluminum conductor 4 in the slot 2.

그러나, 이러한 종래 단상 유도 기동형 동기전동기는 기동시 영구자석(3)에 의해 발생하는 슬롯 고조파 성분이 증가되어 기동이 원활하지 못한 문제점이 있다. However, such a conventional single phase induction starting type synchronous motor has a problem in that the starting is not smooth due to an increase in the slot harmonic component generated by the permanent magnet 3 when starting.

또한, 본 발명과 연관되는 종래 기술의 하나인 한국등록특허 10-0690673호(등록일 : 2007.02.27) "하이브리드 유도전동기의 회전자결합체"를 설명하면 아래와 같다. In addition, Korean Patent Registration No. 10-0690673 (Registration Date: 2007.02.27), which is one of the related arts related to the present invention, will be described below.

종래의 유도전동기의 회전자결합체는 회전축과; 원통형의 회전자코어와, 상기 코어를 관통하여 회전축의 축선방향에 대해 소정의 스큐를 가지고 배치되는 복수의 도체바를 구비하여 상기 회전축에 일체로 회전 가능하게 결합되는 유도회전자와; 상기 유도회전자와 소정의 공극을 두고 상기 회전축에 자유회전 가능하게 결합되는 동기회전자를 포함한다. The rotor assembly of the conventional induction motor includes a rotation shaft; An induction rotor having a cylindrical rotor core and a plurality of conductor bars penetrating the core and having a predetermined skew in the axial direction of the rotation axis, the induction rotor being rotatably coupled to the rotation axis; It includes a synchronous rotor to be freely coupled to the rotating shaft leaving a predetermined gap with the induction rotor.

이와 같이, 종래의 유도전동기는 도체바를 스큐 형상으로 배열하여 고조파 성분이 제거되고, 토크발생이 부드러워 팬공진소음을 낮출 수 있다. As described above, the conventional induction motor can arrange the conductor bars in a skew shape to remove harmonic components, and smoothly generate torque, thereby reducing fan resonance noise.

그러나, 이와 같은 스큐를 동기전동기에서는 제조하지 못하는 구조적인 문제점이 있다. However, there is a structural problem that such a skew cannot be manufactured in a synchronous motor.

본 발명은 종래기술의 문제점을 해결하기 위하여 안출한 것으로, 본 발명의 목적은 단상유도 기동형 동기전동기의 회전자의 농형 도체바가 삽입되는 슬롯에 일정한 각도로 스큐를 주어 기동시 기동을 방해하는 고조파 성분을 감소시켜 우수한 기동 특성을 갖도록 하는 단상 유도 기동형 동기전동기의 회전자 구조를 제공하는 데에 있다.The present invention has been made to solve the problems of the prior art, an object of the present invention is to give a skew at a certain angle to the slot in which the cage conductor bar of the rotor of the single-phase induction synchronous motor is inserted at a predetermined angle to harm the starting harmonics It is to provide a rotor structure of a single-phase induction starting synchronous motor to reduce the number and to have excellent starting characteristics.

본 발명의 목적을 달성하기 위하여 본 발명은 동기전동기의 회전자구조에 있어서, 회전자의 농형 도체바가 사용되는 부분에만 스큐(Skew)를 주고, 동기운전을 위한 영구자석이 매입되는 부분에는 스큐를 주지 않는 회전자 구조를 갖는 것을 특징으로 한다. 상기 회전자에 주는 스큐의 각도는 5° 내지 30°의 범위인 것이 바람직하다. In order to achieve the object of the present invention, in the rotor structure of the synchronous motor, the skew (Skew) is given only to the portion in which the rotor conductor bar is used, the skew to the portion where the permanent magnet for synchronous operation is embedded It is characterized by having a rotor structure which is not given. The angle of the skew given to the rotor is preferably in the range of 5 ° to 30 °.

이와 같이 본 발명은 농형 도체바 부분에 스큐를 주는 것으로, 슬롯 고조파 성분은 감소시킬 수 있다.As described above, the present invention applies skew to the portion of the concentrated conductor bar, and the slot harmonic component can be reduced.

이하, 본 발명의 실시예를 도면을 근거로 상세하게 설명한다.Best Mode for Carrying Out the Invention Embodiments of the present invention will be described in detail below with reference to the drawings.

도 4는 본 발명의 동기전동기 회전자 구조를 나타내는 사시도이고, 도 5는 도 4의 단면도이고, 도 6은 도 4의 상면도이다.4 is a perspective view illustrating a synchronous motor rotor structure of the present invention, FIG. 5 is a cross-sectional view of FIG. 4, and FIG. 6 is a top view of FIG. 4.

도 4에 도시된 본 발명의 동기전동기 회전자 구조는 슬롯(2)이 스큐(skew)되는 구조를 갖고, 슬롯(2)의 안쪽은 알루미늄 도체(4)의 4면에 매입형 영구자석 (3 : magnet)이 삽입되어 결합된 것을 특징으로 한다. The synchronous motor rotor structure of the present invention shown in FIG. 4 has a structure in which the slot 2 is skewed, and the inside of the slot 2 is embedded permanent magnet 3 on four sides of the aluminum conductor 4. : magnet) is inserted and coupled.

도 4 내지 도 5에 의하면, 동기전동기 회전자(1)의 구조는 회전자(1)의 외주면에는 스큐된 슬롯(5)으로 형성하고, 동기운전을 위한 영구자석(3)이 매입되는 부분에는 스큐를 주지 않는 회전자 구조를 갖는 것을 특징으로 한다. 상기 회전자에 주는 스큐의 각도는 5° 내지 30°의 범위인 것이 바람직하다. 본 발명의 최선의 실시예에서 주어지는 스큐의 각도는 19°이다. 4 to 5, the structure of the synchronous motor rotor 1 is formed by a skewed slot 5 on the outer circumferential surface of the rotor 1, and the permanent magnet 3 for synchronous operation is embedded in the portion. It is characterized by having a rotor structure which does not give skew. The angle of the skew given to the rotor is preferably in the range of 5 ° to 30 °. In the best embodiment of the present invention the angle of skew is 19 °.

이상에서 상술한 바와 같이 본 발명에 의하면, 회전자의 농형 도체 바(Bar) 부분에 일정한 각도로 스큐를 줌으로써 기동시 생성되는 슬롯 고조파를 저감시켜서 기동특성을 향상시키는 효과가 있다.As described above, according to the present invention, the skew conductor bar portion of the rotor is skewed at a predetermined angle to reduce slot harmonics generated during startup, thereby improving the startup characteristics.

Claims (2)

동기전동기의 회전자구조에 있어서, In the rotor structure of a synchronous motor, 회전자의 농형 도체바가 사용되는 슬롯에만 스큐(Skew)를 주고, 동기운전을 위한 영구자석이 매입되는 부분에는 스큐를 주지 않는 회전자 구조를 갖는 것을 특징으로 단상 유도 기동형 동기전동기의 회전자 구조.The rotor structure of the single-phase induction synchronous motor, characterized in that it has a rotor structure that gives skew only to the slot where the rotor conductor bar is used, and does not give a skew to the part where the permanent magnet for synchronous operation is embedded. 제1항에 있어서, 상기 회전자 슬롯의 스큐 각도는 5° 내지 30°의 범위인 것을 특징으로 단상 유도 기동형 동기전동기의 회전자 구조.The rotor structure of claim 1, wherein the skew angle of the rotor slot is in a range of 5 ° to 30 °.
KR1020070070655A 2007-07-13 2007-07-13 The rotor structure for line start permanent magnet synchronous motor KR20090007050A (en)

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Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102075045A (en) * 2011-01-06 2011-05-25 艾欧史密斯电气产品（苏州）有限公司 Enhanced permanent magnet synchronous motor rotor for starting on line
KR20150043814A (en) 2013-10-15 2015-04-23 현대모비스 주식회사 Rotor with 2-step shaped slot and Induction motor having the same
KR20150043734A (en) 2013-10-15 2015-04-23 현대모비스 주식회사 End-ring for induction mortor, Rotator having the same
KR20150077893A (en) 2013-12-30 2015-07-08 현대모비스 주식회사 Rotor, Induction motor having the same, and Method for manufacturing the same
WO2015170805A1 (en) * 2014-05-08 2015-11-12 전자부품연구원 Rotor having flux filtering function and synchronous motor comprising same
KR102010026B1 (en) * 2018-04-04 2019-08-12 오영한 Induced polarization rotor
WO2022144089A1 (en) * 2020-12-30 2022-07-07 Sew-Eurodrive Gmbh & Co. Kg Electric motor having rotor and squirrel cage winding

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102075045A (en) * 2011-01-06 2011-05-25 艾欧史密斯电气产品（苏州）有限公司 Enhanced permanent magnet synchronous motor rotor for starting on line
KR20150043814A (en) 2013-10-15 2015-04-23 현대모비스 주식회사 Rotor with 2-step shaped slot and Induction motor having the same
KR20150043734A (en) 2013-10-15 2015-04-23 현대모비스 주식회사 End-ring for induction mortor, Rotator having the same
US9729034B2 (en) 2013-10-15 2017-08-08 Hyundai Mobis Co., Ltd. Rotor with 2-step shaped slot and induction motor having the same
US9866095B2 (en) 2013-10-15 2018-01-09 Hyundai Mobis Co., Ltd. End-ring for induction motor, rotor having the same
KR20150077893A (en) 2013-12-30 2015-07-08 현대모비스 주식회사 Rotor, Induction motor having the same, and Method for manufacturing the same
US9520760B2 (en) 2013-12-30 2016-12-13 Hyundai Mobis Co., Ltd. Rotor, induction motor having the same, and method for manufacturing the same
WO2015170805A1 (en) * 2014-05-08 2015-11-12 전자부품연구원 Rotor having flux filtering function and synchronous motor comprising same
US10483813B2 (en) 2014-05-08 2019-11-19 Korea Electronics Technology Institute Rotor having flux filtering function and synchronous motor comprising same
KR102010026B1 (en) * 2018-04-04 2019-08-12 오영한 Induced polarization rotor
WO2022144089A1 (en) * 2020-12-30 2022-07-07 Sew-Eurodrive Gmbh & Co. Kg Electric motor having rotor and squirrel cage winding

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