KR20090062430A - Rotor of motor for hybrid electric vehicle - Google Patents

Rotor of motor for hybrid electric vehicle Download PDF

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Publication number
KR20090062430A
KR20090062430A KR1020070129671A KR20070129671A KR20090062430A KR 20090062430 A KR20090062430 A KR 20090062430A KR 1020070129671 A KR1020070129671 A KR 1020070129671A KR 20070129671 A KR20070129671 A KR 20070129671A KR 20090062430 A KR20090062430 A KR 20090062430A
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KR
South Korea
Prior art keywords
permanent magnet
rotor
divided
magnets
motor
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KR1020070129671A
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Korean (ko)
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조형준
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현대자동차주식회사
기아자동차주식회사
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Priority to KR1020070129671A priority Critical patent/KR20090062430A/en
Publication of KR20090062430A publication Critical patent/KR20090062430A/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
    • H02K1/27—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]
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K6/00—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00
    • B60K6/20—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00 the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs
    • B60K6/22—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00 the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs characterised by apparatus, components or means specially adapted for HEVs
    • B60K6/26—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00 the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs characterised by apparatus, components or means specially adapted for HEVs characterised by the motors or the generators
    • 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

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Iron Core Of Rotating Electric Machines (AREA)
  • Permanent Field Magnets Of Synchronous Machinery (AREA)

Abstract

A rotor of a drive motor for hybrid vehicle is provided to reduce an eddy current path of a magnet and hysteresis loss by dividing a magnet into an axial direction or a lateral direction to form a divided structure. A rotor of a drive motor for hybrid vehicle is formed by inserting a permanent magnet into an internal space of a rotor core(2). The rotor is formed with a permanent magnet assembly(10) having a separate structure. The permanent magnet is divided into magnets(11,12). The separate structure is formed by bonding the magnets of the insulating state with each other. The rotor is inserted into an internal space of a rotor core. In the permanent magnet assembly, the divided magnets are boned with each other by using an insulating adhesive. The insulating state between the magnets are formed by using the insulating adhesive.

Description

하이브리드 차량용 구동모터의 회전자{Rotor of motor for hybrid electric vehicle}Rotor of motor for hybrid electric vehicle

본 발명은 하이브리드 차량용 구동모터의 회전자에 관한 것으로서, 더욱 상세하게는 내부에 삽입되는 자석이 축방향 혹은 그 횡방향으로 분할한 분할형 구조로 제작되어 조립됨으로써, 자석에서 와전류의 경로가 감소되면서 손실(철손)이 저감될 수 있고, 결국 모터 효율 증대, 영구자석의 불가역 감자 방지, 모터의 고온내구성 향상 등의 효과가 있게 되는 하이브리드 차량용 구동모터의 회전자에 관한 것이다. The present invention relates to a rotor of a driving motor for a hybrid vehicle, and more particularly, a magnet inserted therein is manufactured and assembled in a divided structure divided into an axial direction or a transverse direction thereof, thereby reducing the path of eddy current in the magnet. Loss (iron loss) can be reduced, and eventually to the rotor of the hybrid motor drive motor to be effective in increasing the motor efficiency, preventing irreversible demagnetization of the permanent magnet, improving the high temperature durability of the motor.

일반적으로 넓은 의미의 하이브리드 차량은 서로 다른 두 종류 이상의 동력원을 효율적으로 조합하여 차량을 구동시키는 것을 의미하나, 대부분의 경우는 엔진과 전기모터에 의해 구동력을 얻는 차량을 의미하며, 이를 하이브리드 전기 차량(Hybrid Electric Vehicle, HEV)이라 부르고 있다.In general, a hybrid vehicle in a broad sense means to drive a vehicle by efficiently combining two or more different power sources, but in most cases, a vehicle that is driven by an engine and an electric motor. Hybrid Electric Vehicle (HEV).

최근 연비를 개선하고 보다 환경친화적인 제품을 개발해야 한다는 시대적 요 청에 부응하여 하이브리드 차량에 대한 연구가 더욱 활발히 진행되고 있다.In response to the recent demand for improving fuel economy and developing more environmentally friendly products, research on hybrid vehicles is being actively conducted.

상기와 같이 하이브리드 차량에서는 동력원으로 엔진과 전기모터가 구비되어 있고, 여기서 전기모터(차량 구동을 위한 것으로서, 이하 구동모터라 칭함)는 차량에 탑재된 고전압 배터리의 전력을 제공받아 구동된다. As described above, in a hybrid vehicle, an engine and an electric motor are provided as power sources, and the electric motor (for driving a vehicle, hereinafter referred to as a driving motor) is driven by receiving power from a high voltage battery mounted in the vehicle.

엔진과 구동모터를 동력원으로 하는 하이브리드 차량에서, 초기 출발 및 저속 주행시에는 저 RPM에서 효율이 좋은 구동모터를 사용하여 차량 출발 및 주행을 도모하며, 급가속 주행시 등 특정 주행 조건에서는 엔진과 구동모터가 함께 구동하여 이들 두 동력원으로부터 차량의 구동력을 얻게 된다.In a hybrid vehicle powered by an engine and a driving motor, the vehicle starts and runs using a drive motor that is efficient at low RPM during initial start and low speed driving.In certain driving conditions such as rapid acceleration, the engine and driving motor Drive together to get the driving force of the vehicle from these two power sources.

한편, 하이브리드 차량용 구동모터는 통상의 모터와 마찬가지로 고정자 코어에 코일이 감겨져 구성된 고정자와, 상기 고정자 안쪽으로 배치되는 회전자를 주요 구성부로 하며, 상기 회전자는 회전자 코어에 영구자석이 삽입되어 구성된다.On the other hand, the drive motor for a hybrid vehicle has a stator composed of a coil wound around a stator core like a normal motor, and a rotor disposed inside the stator as a main component, and the rotor includes a permanent magnet inserted into the rotor core. .

첨부한 도 1은 하이브리드 차량용 구동모터에서 종래의 영구자석 삽입구조를 도시한 사시도로서, 도시된 바와 같이, 종래에는 회전자 코어(2)의 삽입홈(2a) 내부에 영구자석(10)을 삽입할 때 도시된 바와 같이 영구자석(하나의 자석)을 통째로 삽입하여 조립하게 된다.1 is a perspective view illustrating a conventional permanent magnet insertion structure in a drive motor for a hybrid vehicle. As shown in the drawings, the permanent magnet 10 is inserted into the insertion groove 2a of the rotor core 2. As shown in the figure, the permanent magnet (one magnet) is inserted into the whole assembly.

그러나, 하나의 자석, 즉 영구자석(10)을 통째로 삽입하는 구조에서는 다음과 같은 문제점이 있었다.However, the structure of inserting a single magnet, that is, the permanent magnet 10 as a whole, has the following problems.

높은 자속 밀도와 고효율을 위해서 희토류 자석을 사용하는 경우, 자석이 가지는 높은 도전성과 낮은 비저항에 의해 자석 내부에 와전류(eddy current)가 발생하기 쉽다.When a rare earth magnet is used for high magnetic flux density and high efficiency, eddy current is likely to occur inside the magnet due to the high conductivity and low specific resistance of the magnet.

도 1에서 와전류 경로를 화살표로 도시하였으며, 이러한 와전류로 인해 생기는 철손은 모터의 효율을 낮출 뿐만 아니라 온도 증가로 인한 영구자석의 불가역 감자를 초래하기 쉽고, 이는 치명적 모터 성능 저하의 원인이 된다.In FIG. 1, the eddy current path is shown by an arrow, and the iron loss caused by such eddy current not only lowers the efficiency of the motor but also causes irreversible demagnetization of permanent magnets due to an increase in temperature, which causes fatal motor performance.

따라서, 본 발명은 상기와 같은 문제점을 해결하기 위하여 발명한 것으로서, 내부에 삽입되는 자석이 축방향 혹은 그 횡방향으로 분할한 분할형 구조로 제작되어 조립됨으로써, 자석에서 와전류의 경로가 감소되면서 손실(철손)이 저감될 수 있고, 결국 모터 효율 증대, 영구자석의 불가역 감자 방지, 모터의 고온내구성 향상 등의 효과가 있게 되는 하이브리드 차량용 구동모터의 회전자를 제공하는데 그 목적이 있다.Accordingly, the present invention has been invented to solve the above problems, the magnet is inserted into the divided structure is divided into the axial direction or the lateral direction to be assembled and assembled, thereby reducing the path of the eddy current in the magnet is lost It is an object of the present invention to provide a rotor of a hybrid motor drive motor which can reduce (iron loss), and eventually has an effect of increasing motor efficiency, preventing irreversible demagnetization of permanent magnets, and improving high temperature durability of the motor.

상기한 목적을 달성하기 위해, 본 발명은, 회전자 코어의 내부공간에 영구자석이 삽입되어 구성된 하이브리드 차량용 구동모터의 회전자에 있어서, 상기 영구자석이 복수로 분할된 자석들을 절연상태로 접합하여 이루어진 분할형 구조의 영구자석 조립체 형태로 제작되어 회전자 코어의 내부공간에 삽입된 것을 특징으로 하는 하이브리드 차량용 구동모터의 회전자를 제공한다.In order to achieve the above object, the present invention, in the rotor of the drive motor for a hybrid vehicle configured to insert a permanent magnet into the inner space of the rotor core, the permanent magnet is bonded to a plurality of divided magnets in an insulating state It is made in the form of a permanent magnet assembly of the divided structure made of a rotor of the hybrid motor drive motor, characterized in that inserted into the inner space of the rotor core.

여기서, 상기 영구자석 조립체는 분할된 자석들을 절연 접착제로 접합시켜 상기 접착제에 의해 자석간 절연이 이루어지도록 제작된 것을 특징으로 한다.Here, the permanent magnet assembly is characterized in that the magnets are manufactured to bond between the divided magnets with an insulating adhesive is made between the magnets by the adhesive.

또한 상기 영구자석 조립체는 모터축 기준으로 축방향, 또는 축방향의 횡방향, 또는 축방향 및 횡방향으로 분할된 자석들이 접합되어 이루어진 분할형 구조인 것을 특징으로 한다.In addition, the permanent magnet assembly is characterized in that the divided structure consisting of the magnets are divided in the axial direction, the axial direction, or the axial direction and the lateral direction relative to the motor axis.

바람직하게는, 상기 영구자석 조립체는 모터축 기준으로 축방향으로 2분할된 2개의 자석이 접합되어 이루어진 분할형 구조인 것을 특징으로 한다.Preferably, the permanent magnet assembly is characterized in that the divided structure consisting of two magnets are divided into two axial directions relative to the motor shaft.

상기한 바와 같은 본 발명의 회전자에 의하면, 상기와 같은 본 발명의 회전자에서는 내부에 삽입되는 자석을 축방향 혹은 그 횡방향으로 분할한 분할형 구조로 제작하여 조립함으로써, 자석에서 와전류의 경로가 감소되면서 손실(철손)이 저감될 수 있고, 결국 모터 효율 증대, 영구자석의 불가역 감자 방지, 모터의 고온내구성 향상 등의 효과가 있게 된다.According to the rotor of the present invention as described above, in the rotor of the present invention as described above by manufacturing and assembling the magnet inserted into the divided structure divided into the axial direction or the transverse direction, the path of eddy current in the magnet The loss (iron loss) can be reduced, and as a result, it is possible to increase the motor efficiency, prevent irreversible demagnetization of the permanent magnet, and improve the high temperature durability of the motor.

이하, 첨부한 도면을 참조하여 본 발명의 실시예에 대해 더욱 상세히 설명하면 다음과 같다.Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

본 발명은 하이브리드 차량용 구동모터의 회전자에 관한 것으로서, 구동모터의 손실 저감을 위해 회전자 코어 내부에 조립되는 영구자석이 분할형으로 제작되어 조립된 것에 주된 특징이 있는 것이다.The present invention relates to a rotor of a drive motor for a hybrid vehicle, and the main feature is that the permanent magnet assembled inside the rotor core is manufactured in a divided form in order to reduce the loss of the drive motor.

첨부한 도 2는 본 발명에 따른 회전자 코어 및 그 내부에 삽입되는 영구자석의 분할상태를 도시한 사시도이고, 도 3은 회전자 코어에 분할형 영구자석이 삽입되어 구성된 본 발명의 회전자를 도시한 평면도이다. 2 is a perspective view illustrating a divided state of a rotor core and a permanent magnet inserted into the rotor core according to the present invention, and FIG. 3 illustrates a rotor of the present invention configured by inserting a split permanent magnet into a rotor core. It is a top view shown.

또한 첨부한 도 4는 본 발명에 따른 회전자에서 영구자석의 여러 분할 예를 나타낸 도면이다.In addition, Figure 4 is a view showing several examples of division of the permanent magnet in the rotor according to the present invention.

본 발명에서는 종래의 문제점을 해결하고자 회전자 코어(2)의 삽입홈(2a) 내부에 삽입되는 영구자석(10)을 분할형으로 제작하여 삽입하며, 이를 통해 영구자석의 표면적을 줄이고 전기저항을 증가시켜 와전류를 감소시킨다.In the present invention, in order to solve the conventional problems by inserting the permanent magnet 10 is inserted into the insertion groove (2a) of the rotor core (2) in a divided form, thereby reducing the surface area of the permanent magnet and reduce the electrical resistance To increase the eddy current.

즉, 본 발명의 회전자에서는 회전자 코어(2) 내부에 삽입되는 영구자석(10)이 복수개의 자석(11,12)이 일체로 조립되어 구성된 분할형 구조로 되어 있으며, 이때 영구자석은 도 2에 도시된 바와 같이 축방향(모터축 기준 축방향, 종방향)으로 분할되는 구조이거나, 또는 축방향의 횡방향으로 분할되는 구조로 제작된다.That is, in the rotor of the present invention, the permanent magnet 10 inserted into the rotor core 2 has a split structure in which a plurality of magnets 11 and 12 are integrally assembled, and the permanent magnet is shown in FIG. As shown in Fig. 2, the structure is divided in the axial direction (motor axis reference axial direction, longitudinal direction) or the structure is divided in the axial direction transverse direction.

이러한 분할형 구조의 영구자석(10)은 분할된 복수개의 영구자석(11,12)이 조합된 구조이며, 회전자 코어(2) 내부에 삽입될 수 있도록 복수개의 영구자석(11,12)을 조합하여 일체로 만든 구조이다.The permanent magnet 10 of the split type structure is a structure in which a plurality of divided permanent magnets 11 and 12 are combined, and the plurality of permanent magnets 11 and 12 can be inserted into the rotor core 2. It is a structure made by combining.

도 2를 참조하면, 본 발명의 회전자에 사용되는 영구자석의 분할상태의 일 예를 보여주고 있는데, 축방향으로 2분할된 영구자석 조립체(10)를 보여주고 있다.2 shows an example of a divided state of a permanent magnet used in the rotor of the present invention, and shows a permanent magnet assembly 10 divided into two in the axial direction.

이와 같은 2분할 영구자석 조립체(10)는 종래와 마찬가지로 회전자 코어(2)의 삽입홈(2a) 내부공간에 삽입되어 조립된다.The two-part permanent magnet assembly 10 is inserted into the insertion space 2a of the rotor core 2 and assembled as in the prior art.

도 3을 참조하면, 도 2에 도시된 2분할 영구자석 조립체(10)가 회전자 코어(2)의 삽입홈(2a) 내부에 삽입된 상태를 보여주고 있으며, 고정자 코어(1) 안쪽으로 회전자 코어(2)가 배치되고 있고, 상기 회전자 코어(2)의 내부공간에 2개의 자석(11,12)이 절연상태로 조합된 2분할 영구자석 조립체(10)가 삽입되어 설치되고 있다.Referring to FIG. 3, the two-part permanent magnet assembly 10 illustrated in FIG. 2 is inserted into the insertion groove 2a of the rotor core 2, and rotates into the stator core 1. The electronic core 2 is arranged, and a two-part permanent magnet assembly 10 in which two magnets 11 and 12 are combined in an insulating state is inserted into the inner space of the rotor core 2.

도 4를 참조하면, (a)는 회전자 코어에 삽입되는 종래의 영구자석을 나타내며, 영구자석 전체가 하나의 자석으로 구성되어 있다.Referring to Figure 4, (a) shows a conventional permanent magnet inserted into the rotor core, the entire permanent magnet is composed of one magnet.

(b)는 본 발명의 일 실시예에 따른 영구자석의 평면도로서 축방향(도면상 종방향)으로 2분할된 영구자석 조립체를 보여주고 있으며, (c)와 (d)는 본 발명의 다른 실시예에 따른 영구자석의 평면도로서, (c)는 축방향으로 3분할된 영구자석 조립체를 보여주고 있으며, (d)는 축방향으로 4분할된 영구자석 조립체를 보여주고 있다.(b) is a plan view of a permanent magnet according to an embodiment of the present invention showing a permanent magnet assembly divided into two in the axial direction (lengthwise in the drawing), (c) and (d) is another embodiment of the present invention As a top view of the permanent magnet according to the example, (c) shows the permanent magnet assembly divided into three in the axial direction, (d) shows the permanent magnet assembly divided into four in the axial direction.

또한 (e)와 (f)는 본 발명의 또 다른 실시예의 영구자석을 도시한 정면도로서, (e)는 횡방향으로 2분할된 영구자석 조립체를, (f)는 축방향 및 횡방향으로 각각 2분할된 4분할 영구자석 조립체를 보여주고 있다.In addition, (e) and (f) is a front view showing a permanent magnet of another embodiment of the present invention, (e) is a permanent magnet assembly divided into two in the transverse direction, (f) in the axial and transverse directions, respectively A two-part, four-part permanent magnet assembly is shown.

이와 같이 복수개의 분할 자석(11,12,10a)을 조립하여 종래와 같이 회전자 코어의 내부공간에 삽입될 수 있도록 한 영구자석 조립체(10)는 다음의 과정으로 제작된다.As described above, the permanent magnet assembly 10 is assembled by the plurality of split magnets 11, 12, and 10a to be inserted into the inner space of the rotor core as in the prior art.

첨부한 도 5는 본 발명에 따른 영구자석 조립체를 제작하는 과정을 설명하는 도면으로, 하나의 분할형 영구자석 조립체를 제작하기 위해서는, 영구자석(통상의 구동모터용 영구자석을 사용함)을 원하는 개수가 되게 축방향 또는 횡방향으로 분할 가공하는 분할 가공 과정과, 상기 분할된 자석(10a)들을 절연 접착제(13)를 이용해 절연상태로 접합시켜 일체화하는 접합 과정과, 접합된 분할 자석의 최종 가공을 하는 최종 가공 과정과, 최종 표면 처리(코팅) 가공을 하여 영구자석 조립체(10)를 완성하는 최종 표면 처리 과정으로 진행된다.5 is a view illustrating a process of manufacturing a permanent magnet assembly according to the present invention. In order to manufacture a single split permanent magnet assembly, a desired number of permanent magnets (usually a permanent magnet for a driving motor) is desired. The splitting process of splitting in the axial direction or the transverse direction so that the divided magnets (10a) in an insulated state using the insulating adhesive 13 to bond and integrate, and the final processing of the bonded split magnets The final machining process, and the final surface treatment (coating) is carried out to the final surface treatment process to complete the permanent magnet assembly (10).

상기와 같이 본 발명에 따른 영구자석 조립체(10)는 여러 개로 분할된 자석(10a)들을 접착제(13)로 접합하여 하나의 영구자석처럼 제작하며, 자석을 분할하여 제작해도 실제 작업은 1피스처럼 제작이 가능하므로 작업성은 동등하면서 성능 증대가 가능해진다.As described above, the permanent magnet assembly 10 according to the present invention is manufactured as one permanent magnet by bonding the magnets 10a divided into a plurality of adhesives 13, and even if the magnets are divided, the actual work is like one piece. Since manufacturing is possible, workability is equivalent and performance can be increased.

특히, 본 발명에 따른 분할형 영구자석 조립체는 접착제가 개재된 부위에서 자석간 절연이 이루어지도록 하며, 도 3에 나타낸 바와 같이 자석(11,12) 간 에어 갭으로 인해 와전류(eddy current)의 절연이 이루어지게 된다.In particular, the split type permanent magnet assembly according to the present invention allows insulation between the magnets at a site where an adhesive is interposed, and as shown in FIG. 3, insulation of eddy currents due to an air gap between the magnets 11 and 12. This is done.

도 4에서 본 발명에 따른 분할형 영구자석 조립체가 여러 형태, 즉 모터축 기준 축방향으로 2분할, 3분할, 4분할, 모터축 기준 횡방향으로 2분할, 그리고 모터축 기준 축방향 2분할 및 횡방향 2분할 구조를 예로 들었으나, 분할되는 개수는 다양하게 변경 적용이 가능하며(2분할, 3분할, 4분할), 다만 분할 개수가 증가할수록 와전류 손실은 저감되지만 제작원가 및 작업공수가 증가하므로, 바람직하게는 분할 개수 대비 손실 저감 효과가 가장 큰 모터축 기준 축방향의 2분할 구조(도 4에서 (b) 참조)로 하는 것이 좋다.In FIG. 4, the divided permanent magnet assembly according to the present invention has various forms, that is, two divisions, three divisions, four divisions in the axial direction of the motor shaft, two divisions in the transverse direction of the motor shaft, and two divisions of the axial direction of the motor shaft. Although the two-segment split structure is used as an example, the number of divisions can be changed in various ways (two divisions, three divisions, and four divisions). However, as the number of divisions increases, the eddy current loss decreases, but the manufacturing cost and workmanship increase. Therefore, it is preferable to set it as the 2 division structure (refer FIG. 4 (b) in FIG. 4) of the motor-axis reference axis direction which has the largest loss reduction effect compared with the division number.

첨부한 도 6은 도 4에 도시된 바와 같이 분할된 영구자석 조립체의 손실 저감 효과를 나타낸 것으로, 이를 참조하면, 종래와 같이 분할 없이 하나의 영구자석을 사용하는 것에 비해 본 발명에서와 같이 (b) ~ (e)의 분할형 구조를 채용할 경우 모두 와전류 손실이 저감되는 효과가 있는 것을 알 수 있다.FIG. 6 shows the loss reduction effect of the permanent magnet assembly divided as shown in FIG. 4. Referring to this, as in the present invention, as compared to the use of one permanent magnet without division as in the prior art, (b) It can be seen that the eddy current loss can be reduced in all cases when the split type structures of () to (e) are employed.

이하, 본 발명에 따른 분할형 구조의 작용효과에 대해 설명하면, 영구자석을 축방향 또는 횡방향으로 분할할 경우, 손실을 초래하는 와전류의 경로가 줄어들어 철손이 저감되고(도 1과 도 2에서 화살표로 나타낸 와전류 경로 참조), 이에 모터 효율이 증대되는 것은 물론 영구자석의 불가역 감자가 방지되는 효과가 있게 된다.Hereinafter, the operational effects of the divided structure according to the present invention, when dividing the permanent magnet in the axial or transverse direction, the path of the eddy current causing the loss is reduced to reduce the iron loss (Fig. 1 and 2) See the eddy current path indicated by the arrow), thereby increasing the motor efficiency and preventing the irreversible demagnetization of the permanent magnet.

도 1의 와전류 경로를 참조하면, 분할 없이 하나의 영구자석이 제작 및 삽입될 경우에 화살표로 나타낸 바와 같이 와전류의 경로가 길어지면서 손실(철손)이 증대될 수 있다.Referring to the eddy current path of FIG. 1, when one permanent magnet is manufactured and inserted without splitting, the loss (iron loss) may be increased as the path of the eddy current becomes longer as indicated by the arrow.

반면, 도 2의 와전류 경로를 참조하면, 자석을 축방향 혹은 그 횡방향으로 분할 제작 및 삽입할 경우에 화살표로 나타낸 바와 같이 와전류의 경로가 감소되면서 손실(철손)이 저감될 수 있고, 결국 모터 효율 증대, 영구자석의 불가역 감자 방지, 모터의 고온내구성 향상 등의 효과가 있게 된다.On the other hand, referring to the eddy current path of FIG. 2, when the magnet is dividedly manufactured and inserted in the axial direction or the lateral direction, loss (iron loss) can be reduced as the path of the eddy current is reduced as indicated by the arrow, and thus the motor Increase efficiency, prevent irreversible demagnetization of permanent magnets, and improve the high temperature durability of the motor.

도 1은 하이브리드 차량용 구동모터에서 종래의 영구자석 삽입구조를 도시한 사시도,1 is a perspective view showing a conventional permanent magnet insertion structure in a drive motor for a hybrid vehicle,

도 2는 본 발명에 따른 회전자 코어 및 그 내부에 삽입되는 영구자석의 분할상태를 도시한 사시도, Figure 2 is a perspective view showing a divided state of the rotor core and the permanent magnet inserted therein according to the present invention,

도 3은 회전자 코어에 분할형 영구자석이 삽입되어 구성된 본 발명의 회전자를 도시한 평면도, 3 is a plan view illustrating a rotor of the present invention in which a split permanent magnet is inserted into a rotor core;

도 4는 본 발명에 따른 회전자에서 영구자석의 여러 분할 예를 나타낸 도면,4 is a view showing several examples of dividing the permanent magnet in the rotor according to the present invention,

도 5는 본 발명에 따른 영구자석 조립체를 제작하는 과정을 설명하는 도면,5 is a view illustrating a process of manufacturing a permanent magnet assembly according to the present invention;

도 6은 도 4에 도시된 바와 같이 분할된 영구자석 조립체의 손실 저감 효과를 나타낸 도면.6 is a view showing a loss reduction effect of the permanent magnet assembly divided as shown in FIG.

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

1 : 고정자 코어 2 : 회전자 코어1 stator core 2 rotor core

2a : 삽입홈 10 : 영구자석 조립체2a: insertion groove 10: permanent magnet assembly

10a, 11, 12 : 분할 자석 13 : 접착제10a, 11, 12: split magnet 13: adhesive

Claims (4)

회전자 코어의 내부공간에 영구자석이 삽입되어 구성된 하이브리드 차량용 구동모터의 회전자에 있어서,In a rotor of a drive motor for a hybrid vehicle configured by inserting a permanent magnet into the inner space of the rotor core, 상기 영구자석이 복수로 분할된 자석들을 절연상태로 접합하여 이루어진 분할형 구조의 영구자석 조립체 형태로 제작되어 회전자 코어의 내부공간에 삽입된 것을 특징으로 하는 하이브리드 차량용 구동모터의 회전자.The rotor of the hybrid motor drive motor, characterized in that the permanent magnet is manufactured in the form of a permanent magnet assembly of a divided structure formed by joining a plurality of divided magnets in an insulating state and inserted into the inner space of the rotor core. 청구항 1에 있어서,The method according to claim 1, 상기 영구자석 조립체는 분할된 자석들을 절연 접착제로 접합시켜 상기 접착제에 의해 자석간 절연이 이루어지도록 제작된 것을 특징으로 하는 하이브리드 차량용 구동모터의 회전자.The permanent magnet assembly is a rotor of the hybrid motor drive motor, characterized in that the insulation between the magnet is made by bonding the divided magnets with an insulating adhesive. 청구항 1에 있어서,The method according to claim 1, 상기 영구자석 조립체는 모터축 기준으로 축방향, 또는 축방향의 횡방향, 또는 축방향 및 횡방향으로 분할된 자석들이 접합되어 이루어진 분할형 구조인 것을 특징으로 하는 하이브리드 차량용 구동모터의 회전자.The permanent magnet assembly is a rotor of a hybrid motor drive motor, characterized in that the divided structure consisting of a plurality of magnets divided in the axial direction, the axial direction, or the axial direction and the lateral direction relative to the motor shaft. 청구항 1에 있어서,The method according to claim 1, 상기 영구자석 조립체는 모터축 기준으로 축방향으로 2분할된 2개의 자석이 접합되어 이루어진 분할형 구조인 것을 특징으로 하는 하이브리드 차량용 구동모터의 회전자. The permanent magnet assembly is a rotor of a hybrid motor drive motor, characterized in that the divided structure consisting of two magnets are divided into two axial directions on the basis of the motor shaft.
KR1020070129671A 2007-12-13 2007-12-13 Rotor of motor for hybrid electric vehicle KR20090062430A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10421223B2 (en) 2015-12-01 2019-09-24 Hyundai Motor Company Apparatus and method for manufacturing permanent magnet

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10421223B2 (en) 2015-12-01 2019-09-24 Hyundai Motor Company Apparatus and method for manufacturing permanent magnet

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