KR101072025B1 - Rotor of driven motor for Hybrid Electric Vehicle - Google Patents

Rotor of driven motor for Hybrid Electric Vehicle Download PDF

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KR101072025B1
KR101072025B1 KR1020090083941A KR20090083941A KR101072025B1 KR 101072025 B1 KR101072025 B1 KR 101072025B1 KR 1020090083941 A KR1020090083941 A KR 1020090083941A KR 20090083941 A KR20090083941 A KR 20090083941A KR 101072025 B1 KR101072025 B1 KR 101072025B1
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South Korea
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permanent magnet
rotor
groove
pair
grooves
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KR1020090083941A
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Korean (ko)
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KR20110026162A (en
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문상훈
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기아자동차주식회사
현대자동차주식회사
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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
    • 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

Abstract

본 발명은 하이브리드차량인 HEV(Hybrid Electric Vehicle)가 고전압 배터리로 구동되는 매입형 영구자석 동기모터를 갖추고, 상기 모터가 쌍을 이루는 영구자석(5,5')의 극 사이로 한쌍의 U자 단면홈(20a,20b)을 배치한 회전자를 갖춤으로써, 영구자석(5,5')의 끝단부 자속변화 저감으로 와전류손을 저감하면서 역기전압 THD(전고조파 외형률)을 크게 저감한 정현적인 역기전압 파형을 갖고, D축과 Q축의 인덕턴스 차이인 돌극비를 V자 형상홈 구조에 비해 향상하면서 증가된 Q축 인덕턴스로 릴럭턴스 토크를 추가적으로 활용해 효율을 상승할 수 있는 특징을 갖는다.The present invention is a hybrid vehicle HEV (hybrid electric vehicle) is equipped with a permanent magnet synchronous motor driven by a high voltage battery, a pair of U-shaped grooves between the poles of the permanent magnet (5, 5 ') that the motor is paired Equipped with a rotor arranged at (20a, 20b), a sine counter electromotive voltage that greatly reduces the counter electromotive voltage THD (total harmonic appearance factor) while reducing the eddy current loss by reducing the magnetic flux change at the end of the permanent magnet (5, 5 '). It has a waveform, and improves efficiency by further using reluctance torque with increased Q-axis inductance while improving the pole ratio, which is the difference between the inductance between the D-axis and the Q-axis, compared to the V-shaped groove structure.

회전자, 홈, 인덕턴스 Rotor, groove, inductance

Description

하이브리드 구동모터의 회전자{Rotor of driven motor for Hybrid Electric Vehicle} Rotor of driven motor for Hybrid Electric Vehicle

본 발명은 하이브리드 구동모터에 관한 것으로, 특히 하이브리드 구동모터의 회전자에 관한 것이다.The present invention relates to a hybrid drive motor, and more particularly to a rotor of a hybrid drive motor.

일반적으로 하이브리드전기차량(Hybrid Electric Vehicle, HEV)에서는 동력원으로 엔진과 구동모터가 구비되며, 하이브리드차량이라 불린다.In general, a hybrid electric vehicle (HEV) is provided with an engine and a driving motor as a power source, and is called a hybrid vehicle.

상기와 같은 하이브리드 차량인 HEV는 엔진클러치를 장착하여 모터와 엔진을 분리하고 자동변속기를 이용함으로써, EV(전기차)모드 출발이 가능하고, 엔진과 모터구동을 동시 사용하는 HEV 모드도 가능하다.The hybrid vehicle HEV is equipped with an engine clutch to separate the motor from the engine and uses an automatic transmission, so that the EV (electric vehicle) mode can be started, and the HEV mode using the engine and the motor drive at the same time is possible.

상기와 같은 HEV에 적용된 구동모터는 통상의 모터와 마찬가지로 고정자 코어에 코일이 감겨져 구성된 고정자와, 상기 고정자 안쪽으로 배치되어 회전자 코어에 영구자석을 삽입한 회전자를 주요 구성부로 하며, 12V 배터리와 별도로 장착된 약 270V 고전압 배터리의 전력을 제공받아 구동된다. The driving motor applied to the HEV is a stator composed of a coil wound around a stator core like a normal motor, and a rotor disposed inside the stator to insert a permanent magnet into the rotor core as a main component. It is powered by a separately mounted 270V high voltage battery.

표면 부착형 영구자석 동기모터는 D축과 Q축의 인덕턴스 차이인 돌극비가 0(D축, Q축 인덕턴스가 동일)이므로 릴럭턴스 토크를 발생시키지 않지만, 매입형 영구자석 동기 모터의 가장 큰 특징 중 하나는 상기 돌극비에 의한 릴럭턴스 토크를 발생하는 장점을 가지므로, 높은 효율과 출력밀도를 요구하는 HEV의 특성상 매입형 영구자석 동기모터를 적용한다. Surface-mounted permanent magnet synchronous motors do not generate reluctance torque because the pole ratio, which is the difference between the inductance of the D and Q axes, is 0 (the D and Q axis inductances are the same), but among the biggest features of the embedded permanent magnet synchronous motor One has the advantage of generating reluctance torque due to the pole ratio, and therefore, the embedded permanent magnet synchronous motor is applied due to the characteristics of HEV requiring high efficiency and power density.

상기와 같은 매입형 영구자석 동기모터에서는 역기전압 파형이 효율 및 모터 전체 성능에 많은 영향을 미치므로, 역기전압의 THD(전고조파 외형률)을 낮게 한 정현적인 역기전압 파형을 갖도록 설계하는게 중요하다.In the embedded permanent magnet synchronous motor as described above, since the back EMF waveform affects the efficiency and the overall performance of the motor, it is important to design a sine back EMF waveform having a low THD (total harmonic appearance factor) of the back EMF voltage.

설계시 역기전압 THD를 낮추는 방식으로는 영구자석 극 사이에 홈을 배치하는데, 이로 인해 극과 극 사이로 누설되는 자속량을 감소시켜 역기전압 파형을 정현적으로 만들며, 동시에 영구자석 끝단부의 자속변화량을 감소시켜 영구자석 내 와전류손을 저감하는 작용을 한다.In the design, a method of lowering the counter voltage THD is to place a groove between the permanent magnet poles, which reduces the amount of magnetic flux leaking between the poles and makes the counter voltage waveform sine, while at the same time changing the magnetic flux change at the end of the permanent magnet. It reduces the eddy current loss in the permanent magnet.

상기와 같은 홈은 그 형상이 성능에 매우 큰 영향을 끼치고 통상 영구자석 극 사이 Q축자로에 V자 형상 홈을 배치한다.Such grooves have a very significant effect on their performance and usually place V-shaped grooves in the Q axis between the permanent magnet poles.

하지만, 상기 홈을 V자 형상으로 만들면 그 형상으로 인해 Q축 인덕턴스를 낮추는 자기 저항을 증가시키므로, 매입형 영구자석 동기모터가 갖는 장점을 충분히 활용하지 못하는 측면을 발생시킨다. However, when the groove is made into a V-shape, the magneto-resistance lowering the Q-axis inductance due to the shape increases, thereby causing a side that does not fully utilize the advantages of the embedded permanent magnet synchronous motor.

이에 본 발명은 상기와 같은 점을 감안하여 발명된 것으로, 매입형 영구자석 동기모터의 영구자석 극 사이로 배치된 홈을 U자 형상을 갖는 한쌍으로 만들어 줌 으로써, 와전류손 저감과 정현적인 역기전압 파형과 같은 홈을 통한 성능을 유지하면서도 V홈 형상에 비해 Q축 자로 침범을 줄이고, 자기 저항 증가를 방지해 Q축 인덕턴스를 증가시킬 수 있는 회전자를 갖춘 구동모터를 제공함에 목적이 있다.Accordingly, the present invention has been made in view of the above, by making a pair of U-shaped grooves disposed between the permanent magnet poles of the embedded permanent magnet synchronous motor, thereby reducing the eddy current loss and the sinusoidal counter voltage waveform. The purpose of the present invention is to provide a driving motor having a rotor that can increase the Q-axis inductance by reducing the invasion by the Q-axis ruler and preventing the increase of the magnetic resistance, while maintaining the performance through the grooves.

또한, 본 발명은 영구자석 극 사이로 배치된 한쌍의 홈을 U자 형상으로 만들어 줌으로써, 증가된 Q축 인덕턴스를 이용해 릴럭턴스 토크로 활용할 수 있는 회전자를 갖춘 구동모터를 제공함에 목적이 있다.In addition, an object of the present invention is to provide a drive motor having a rotor that can be utilized as reluctance torque by using the increased Q-axis inductance by making a pair of grooves disposed between the permanent magnet poles.

상기와 같은 목적을 달성하기 위한 본 발명은, 하이브리드 구동모터의 회전자가 전력을 제공받는 코일을 감은 코어를 갖춘 고정자 안쪽으로 배치된 환형바디(1)와; The present invention for achieving the above object is an annular body (1) disposed inside the stator having a core wound the coil of the rotor of the hybrid drive motor is powered;

좌·우 영구자석(5,5')으로 한쌍을 이루도록 상기 환형바디(1)에 매입되고, 상기 좌·우 영구자석(5,5')을 간격을 두고 상기 환형바디(1)에 배열된 영구자석유닛(10)과;It is embedded in the annular body (1) to form a pair of left and right permanent magnets (5, 5 '), and arranged in the annular body (1) at intervals of the left and right permanent magnets (5, 5') Permanent magnet unit 10;

쌍을 이루는 상기 좌·우 영구자석(5,5')을 매입하지 않은 상기 환형바디(1)의 구간으로 파여진 U자 단면형상의 간격홈(20);을 포함해 구성된 것을 특징으로 한다.And a U-shaped cross-section spacer 20 which is dug into a section of the annular body 1 which does not embed the paired left and right permanent magnets 5 and 5 '.

상기 간격홈(20)은 U자 단면형상을 갖고 서로 간격을 둔 한쌍의 좌·우단면 홈(20a,20b)으로 구성한다.The gap groove 20 has a U-shaped cross-section and consists of a pair of left and right end grooves 20a and 20b spaced apart from each other.

상기 좌·우단면홈(20a,20b)은 상기 환형바디(1)에 매입된 상기 좌·우 영구자석(5,5')에 도달하지 않는 깊이로 파여진다. The left and right end face grooves 20a and 20b are dug to a depth not reaching the left and right permanent magnets 5 and 5 'embedded in the annular body 1.

상기 좌·우 영구자석(5,5')은 좌측 영구자석(5)과 우측 영구자석(5')이 그 중간위치를 기준으로 위로 경사진 상태로 상기 환형바디(1)에 매입되며, 상기 좌측 영구자석(5)과 우측 영구자석(5')은 각각 서로 간격을 두고 2열로 배열된 제1·2영구자석(6,7,6',7')으로 동일하게 구성되고, 상기 제1·2영구자석(6,7,6',7')은 각각의 형상에 일치하도록 상기 환형바디(1)에 형성된 한쌍의 제1·2홈(3,4,3',4')을 이용해 매입된다. The left and right permanent magnets 5 and 5 'are embedded in the annular body 1 with the left permanent magnets 5 and the right permanent magnets 5' inclined upward based on their intermediate positions. The left permanent magnet 5 and the right permanent magnet 5 'are the same as the first and second permanent magnets 6, 7, 6', and 7 ', which are arranged in two rows at intervals from each other. The two permanent magnets 6, 7, 6 ', and 7' use a pair of first and second grooves 3, 4, 3 'and 4' formed in the annular body 1 so as to correspond to their respective shapes. It is purchased.

상기 제1홈(3,3')에는 이격된 위치에서 빈 공간을 이루는 부가홈(3a,3a')을 더 형성하되, 상기 부가홈(3a,3a')은 위쪽으로 갈수록 테이퍼(Taper)진 단면 형상을 이루며, 상기 부가홈(3a,3a')은 쌍을 이루는 좌·우 영구자석(5,5')을 매입하지 않은 환형바디(1)의 구간으로 파여진 U자 단면형상의 간격홈(20)의 깊이까지 형성한다.The first grooves 3 and 3 'are further provided with additional grooves 3a and 3a' forming an empty space at a spaced apart position, and the additional grooves 3a and 3a 'are tapered toward the top. The additional grooves 3a and 3a 'form a cross-sectional shape, and the U-shaped cross-sectional spacing grooves are formed into a section of the annular body 1 in which the paired left and right permanent magnets 5 and 5' are not embedded. It is formed to the depth of (20).

이러한 본 발명에 의하면, 영구자석 극 사이로 한쌍의 U자 형상 홈을 배치해 영구자석 끝단부 자속변화 저감으로 와전류손을 저감하면서도, 역기전압 THD(전고조파 외형률)을 약 87% 저감한 정현적인 역기전압 파형을 갖는 효과를 갖는다. According to the present invention, a pair of U-shaped grooves are disposed between the permanent magnet poles, and the eddy current loss is reduced by reducing the magnetic flux change at the end of the permanent magnet, while the sine wave is reduced by about 87%. Has the effect of having a voltage waveform.

또한, 본 발명은 한쌍의 U자 형상 홈을 이용해 D축과 Q축의 인덕턴스 차이인 돌극비를 V자 형상홈 구조에 비해 약 20% 이상 향상하고, 줄어든 Q축 자로 침범과 자기 저항 증가 방지로 증가된 Q축 인덕턴스를 이용해 약 20% 정도의 릴럭턴스 토크를 추가 활용으로 효율을 상승할 수 있는 효과도 갖는다.In addition, the present invention uses the pair of U-shaped grooves to improve the pole ratio, which is the difference between the inductances of the D-axis and the Q-axis, by about 20% or more compared to the V-shaped groove structure, and increases the reduced Q-axis ruler to prevent invasion and increase in the magnetoresistance. By using the Q-axis inductance, the efficiency can be increased by additionally using the reluctance torque of about 20%.

이하 본 발명의 실시예를 첨부된 예시도면을 참조로 상세히 설명하며, 이러한 실시예는 일례로서 본 발명이 속하는 기술 분야에서 통상의 지식을 가진 자가 여러 가지 상이한 형태로 구현될 수 있으므로, 여기에서 설명하는 실시예에 한정되지 않는다.DETAILED DESCRIPTION Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. Since the exemplary embodiments of the present invention may be embodied in various different forms, one of ordinary skill in the art to which the present invention pertains may be described herein. It is not limited to the Example to make.

도 1은 본 발명에 따른 하이브리드 구동모터의 회전자의 구성도를 도시한 것인바, 본 발명은 하이브리드차량인 HEV(Hybrid Electric Vehicle)가 고전압 배터리로 구동되는 매입형 영구자석 동기모터를 갖추고, 상기 모터가 쌍을 이루는 영구자석(5,5')의 극 사이로 한쌍의 U자 단면홈(20a,20b)을 배치한 회전자를 갖춘다.1 is a block diagram of a rotor of a hybrid drive motor according to the present invention, the present invention is a hybrid vehicle HEV (Hybrid Electric Vehicle) is equipped with a permanent magnet synchronous motor driven by a high voltage battery, The rotor is provided with a pair of U-shaped grooves 20a and 20b disposed between the poles of the permanent magnets 5 and 5 'where the motor is paired.

상기 회전자는 HEV에 적용되어 12V 배터리와 별도로 장착된 약 270V 고전압 배터리의 전력을 제공받아 구동되는 구동모터의 구조와 마찬가지로, 코어에 코일이 감겨져 구성된 고정자 안쪽으로 배치되고, 코어에 다수 영구자석을 매입한 구조를 이룬다. The rotor is applied to the HEV and is provided inside the stator formed by winding a coil around the core, similar to the structure of a driving motor driven by a power of about 270V high voltage battery mounted separately from the 12V battery, and embeds a plurality of permanent magnets in the core. It forms a structure.

본 실시예에 따른 상기 회전자는 코일을 감은 고정자의 안쪽으로 배치된 환형바디(1)와, 상기 환형바디(1)에 간격을 두고 둘레를 따라 파여진 다수 간격홈(20)과, 상기 간격홈(20)사이에서 상기 환형바디(1)에 매입된 좌·우 영구자석(5,5')으로 쌍을 이루는 영구자석유닛(10)으로 구성한다.The rotor according to the present embodiment is an annular body (1) disposed inwardly of the stator winding the coil, a plurality of interval grooves 20, which are dug along the circumference at intervals on the annular body (1), and the gap groove It consists of a permanent magnet unit 10 paired with left and right permanent magnets (5, 5 ') embedded in the annular body (1) between (20).

상기 영구자석유닛(10)은 서로 대칭을 이루는 한쌍의 좌·우 영구자석(5,5')으로 이루어지고, 상기 좌·우 영구자석(5,5')을 대칭으로 매입하기 위해 상기 간격홈(20)사이의 환형바디(1)의 내부에 서로 대칭을 이루는 한쌍의 좌·우 위치홈(2,2')을 형성한다.The permanent magnet unit 10 is composed of a pair of left and right permanent magnets 5 and 5 'which are symmetrical with each other, and the gap groove for symmetrically purchasing the left and right permanent magnets 5 and 5'. A pair of left and right position grooves 2, 2 'which are symmetrical with each other is formed in the annular body 1 between the (20).

본 실시예에 따른 상기 좌·우 위치홈(2,2')은 상기 간격홈(20)사이의 환형바디(1)의 간격을 그 중간 위치를 기준으로 나누어 형성하되, 동일한 형상을 이루는 한쌍의 제1·2홈(3,4,3',4')으로 형성한다.The left and right position grooves 2 and 2 'according to the present embodiment are formed by dividing the interval of the annular body 1 between the gap grooves 20 based on the intermediate positions thereof, and forming a pair of the same shape. The first and second grooves 3, 4, 3 'and 4' are formed.

상기 제1홈(3,3')은 환형바디(1)의 중간 위치에서 홈경사각(a)으로 위쪽을 향해 경사지며, 상기 제2홈(4,4')도 제1홈(3,3')에 간격을 두고 환형바디(1)의 중간 위치에서 홈경사각(b)으로 위쪽을 향해 경사진 형상을 이룬다.The first grooves 3 and 3 'are inclined upward from the intermediate position of the annular body 1 to the groove inclination angle a, and the second grooves 4 and 4' also have the first grooves 3 and 3. At intervals of '), the annular body 1 forms an inclined upward direction at a groove inclination angle b at an intermediate position of the annular body 1.

상기 홈경사각(a,b)은 동일한 각도를 갖는다.The groove inclination angles a and b have the same angle.

본 실시예에서는 상기 제1홈(3,3')에는 서로 이격된 상태로 부가홈(3a,3a')을 더 형성하고, 상기 부가홈(3a,3a')은 상기 간격홈(20)의 형성 위치에 근접하는 길이를 갖고, 상기 제1홈(3,3')에서 간격홈(20)쪽으로 갈수록 테이퍼(Taper)지는 단면 형상을 이룬다.In the present embodiment, additional grooves 3a and 3a 'are further formed in the first grooves 3 and 3', and the additional grooves 3a and 3a 'are formed in the gap groove 20. It has a length close to the formation position, the taper (Taper) is formed in the cross-sectional shape toward the gap groove 20 toward the gap from the first groove (3, 3 ').

본 실시예에 따른 한쌍의 좌·우 영구자석(5,5')은 각각 쌍을 이루는 제1영 구자석(6,6')과 제2영구자석(7,7')으로 구성하며, 상기 제1·2영구자석(6,7,6',7')은 동일한 형상을 갖는다. The pair of left and right permanent magnets 5 and 5 'according to the present exemplary embodiment includes a first permanent magnet 6 and 6' and a second permanent magnet 7 and 7 'which form a pair, respectively. The first and second permanent magnets 6, 7, 6 ', and 7' have the same shape.

상기 좌측 영구자석(5)의 각 쌍을 이루는 제1영구자석(6)은 좌측 위치홈(2)의 제1홈(3)에 제2영구자석(7)은 제2홈(4)에 각각 매입되고, 상기 우측 영구자석(5')의 각 쌍을 이루는 제1영구자석(6')은 우측 위치홈(2')의 제1홈(3')에 제2영구자석(7')은 제2홈(4')에 각각 매입된다.The first permanent magnet 6 constituting each pair of the left permanent magnet 5 is in the first groove 3 of the left position groove 2, the second permanent magnet 7 is in the second groove 4, respectively The first permanent magnets 6 'which are embedded in each pair of the right permanent magnets 5' are embedded in the first grooves 3 'of the right position grooves 2' and the second permanent magnets 7 ' It is embedded in each of the second grooves 4 '.

본 실시예에서 상기 한쌍의 좌·우 영구자석(5,5')은 서로 대칭으로 배열된 영구자석형성각(A)을 갖고, 상기 영구자석형성각(A)의 중간위치는 간격홈(20)을 형성한 각중심(B)을 이룬다.In the present embodiment, the pair of left and right permanent magnets 5 and 5 'have permanent magnet forming angles A arranged symmetrically with each other, and an intermediate position of the permanent magnet forming angles A is a spacing groove 20. The center of gravity (B) is formed.

상기 영구자석형성각(A)은 한쌍의 좌·우 영구자석(5,5')의 중간위치K 사이로 형성되는 각도를 의미한다.The permanent magnet forming angle (A) means the angle formed between the intermediate position K of the pair of left and right permanent magnets (5, 5 ').

본 실시예에 따른 상기 간격홈(20)은 환형바디(1)에서 서로 간격을 두고 대칭 위치로 파여진 한쌍의 좌·우단면홈(20a,20b)으로 이루어지며, 상기 좌·우단면홈(20a,20b)의 단면형상은 다양하게 형성될 수 있지만, U자 단면형상을 갖는 것이 바람직하다.The spacing groove 20 according to the present embodiment is composed of a pair of left and right end face grooves 20a and 20b which are dug in a symmetrical position at intervals from each other in the annular body 1, and the left and right end face grooves ( The cross-sectional shape of 20a, 20b) may be variously formed, but preferably has a U-shaped cross-sectional shape.

상기 좌·우단면홈(20a,20b)은 매입된 좌·우 영구자석(5,5')에 도달하지 않는 깊이를 가지며, 구체적으로는 좌·우 위치홈(2,2')에 이격된 위치에서 형성된 부가홈(3a,3a')이 끝나는 위치에 일치되는 깊이를 갖는다.The left and right end grooves 20a and 20b have a depth not reaching the embedded left and right permanent magnets 5 and 5 ', and specifically, are spaced apart from the left and right position grooves 2 and 2'. The additional grooves 3a and 3a 'formed at the position have a depth corresponding to the end position.

전술한 바와 같이, 상기 좌·우단면홈(20a,20b)은 상기 한쌍의 좌·우 영구자석(5,5')의 중간 위치인 각중심(B)을 기준으로 대칭을 이룬 구조를 갖는다.As described above, the left and right end face grooves 20a and 20b have a symmetrical structure with respect to the angular center B, which is an intermediate position of the pair of left and right permanent magnets 5 and 5 '.

이와 같이, 본 실시예에 따른 하이브리드차량인 HEV(Hybrid Electric Vehicle)에 적용된 구동모터는 쌍을 이루는 영구자석(5,5')의 극 사이로 한쌍의 U자 단면홈(20a,20b)을 배치한 회전자를 갖춘다.As described above, the driving motor applied to the hybrid electric vehicle (HEV), the hybrid vehicle according to the present embodiment, has a pair of U-shaped grooves 20a and 20b disposed between the poles of the paired permanent magnets 5 and 5 '. Equipped with a rotor.

상기와 같은 회전자는 한쌍의 U자 단면홈(20a,20b)과, 회전자에 매입되어 대칭구조를 이루는 한쌍의 좌·우 영구자석(5,5')이 특정한 위치관계를 형성한다.The rotor as described above forms a specific positional relationship between a pair of U-shaped grooves 20a and 20b and a pair of left and right permanent magnets 5 and 5 'embedded in the rotor to form a symmetrical structure.

즉, 상기 회전자에 매입된 한쌍의 좌·우 영구자석(5,5')은 일정한 영구자석형성각(A)을 갖고 회전자에 등간격을 이루고 다수 배열됨으로써, 한쌍의 U자 단면홈(20a,20b)을 상기 좌·우 영구자석(5,5')의 중간위치인 각중심(B)에 대해 대칭구조로 만들어준다.That is, the pair of left and right permanent magnets 5 and 5 'embedded in the rotor have a constant permanent magnet forming angle A and are arranged at equal intervals on the rotor, so that a pair of U-shaped grooves ( 20a and 20b are symmetrical with respect to the center of gravity B, which is the intermediate position of the left and right permanent magnets 5 and 5 '.

이와 같은 상기 한쌍의 U자 단면홈(20a,20b)은 회전자에 등간격으로 배열된 한쌍의 좌·우 영구자석(5,5')사이에 모두 형성함으로써, 회전자의 어느 위치에서도 동일한 작용을 구현한다.The pair of U-shaped grooves 20a and 20b as described above are formed between the pair of left and right permanent magnets 5 and 5 'arranged at equal intervals on the rotor, thereby having the same function at any position of the rotor. Implement

상기 회전자는 도 1과 같이, 한쌍의 좌·우 영구자석(5,5')의 중간 위치로 관통하는 D축을 형성하고, 상기 한쌍의 좌·우 영구자석(5,5')의 각중심(B)을 관통하는 위치로 Q축을 형성한다.As shown in FIG. 1, the rotor forms a D-axis penetrating to the intermediate position of the pair of left and right permanent magnets 5 and 5 ', and the angular center of the pair of left and right permanent magnets 5 and 5'. The Q axis is formed at the position passing through B).

상기와 같이 D축과 Q축의 위치가 형성되면, 본 실시예에서는 매입형 영구자석 동기 모터의 가장 큰 특징 중 하나인 D축과 Q축의 인덕턴스 차이(돌극비)에 의한 릴럭턴스 토크 발생을 높게 증진시킬 수 있게 된다.When the positions of the D-axis and the Q-axis are formed as described above, in this embodiment, the generation of the reluctance torque due to the difference in inductance (breakthrough ratio) between the D-axis and the Q-axis, which is one of the biggest features of the embedded permanent magnet synchronous motor, is highly enhanced. You can do it.

이는, 본 실시예에 따라 Q축을 형성한 한쌍의 단면홈(20a,20b)을 U자 단면형 상으로 형성하고, 매입된 좌·우 영구자석(5,5')에 도달하지 않는 깊이를 가짐에 기인하는 것으로써, 이로 인해 V자 단면형상에 비해 더욱 향상된 성능을 나타낼 수 있다.This forms a pair of cross-sectional grooves 20a and 20b having a Q-axis in a U-shaped cross-sectional shape according to the present embodiment, and has a depth not reaching the embedded left and right permanent magnets 5 and 5 '. Due to this, it can exhibit more improved performance compared to the V-shaped cross-sectional shape.

상기와 같은 U자 단면형상을 갖는 한쌍의 단면홈(20a,20b)을 적용한 해석결과에 따르면, V자 단면형상에 대비해 영구자석(5,5')은 그 끝단부 자속변화 저감으로 와전류손을 줄이고 역기전압 THD(전고조파 외형률)을 약 87%정도 크게 저감한 정현적인 역기전압 파형을 구현한다.According to the analysis result of applying the pair of cross-sectional grooves 20a and 20b having the U-shaped cross section as described above, the permanent magnets 5 and 5 'have the eddy current loss due to the reduction of the magnetic flux change at the end of the V-shaped cross section. The result is a sinusoidal counter-voltage waveform with a significant reduction of approximately 87% of the total harmonic contour (THD).

이와 더불어, V자 단면형상에 대비해 D축과 Q축의 인덕턴스 차이인 돌극비가 약 20% 이상 향상되고, 증가된 Q축 인덕턴스가 릴럭턴스 토크를 약 20%정도 추가로 활용할 수 있도록 해 효율을 상승할 수 있다. In addition, the breakthrough ratio, which is the difference between the inductance between the D-axis and the Q-axis, is improved by more than 20% compared to the V-shaped cross section, and the increased Q-axis inductance enables the additional use of the reluctance torque by about 20%. can do.

도 1은 본 발명에 따른 하이브리드 구동모터의 회전자의 구성도1 is a configuration diagram of a rotor of a hybrid drive motor according to the present invention

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

1 : 환형바디 2,2' : 좌·우 위치홈1: annular body 2,2 ': left and right position

3,4,3',4' : 제1·2홈 3a,3a' : 부가홈3,4,3 ', 4': First and second grooves 3a, 3a ': Additional groove

5,5' : 좌·우 영구자석5,5 ': Left and right permanent magnet

6,7,6',7' : 제1·2영구자석6,7,6 ', 7': 1st and 2nd permanent magnet

10 : 영구자석유닛10: permanent magnet unit

20 : 간격홈 20a,20b: 좌·우단면홈20: gap groove 20a, 20b: left and right end groove

A : 영구자석형성각 B : 각중심A: Permanent magnet formation angle B: Angle center

a,b : 홈경사각a, b: home slope

Claims (7)

전력을 제공받는 코일을 감은 코어를 갖춘 고정자 안쪽으로 배치된 환형바디와, 서로 간격을 둔 2열의 제1·2영구자석이 한쌍을 이루도록 상기 환형바디에 매입된 좌·우 영구자석을 갖춘 하이브리드 구동모터의 회전자에 있어서, Hybrid drive with an annular body disposed inside the stator with a coil wound core and a left and right permanent magnet embedded in the annular body to pair two first and second permanent magnets spaced apart from each other In the rotor of the motor, 상기 환형바디는 상기 제1영구자석의 매입으로 빈공간이 형성되지 않는 대칭구조의 한쌍으로 이루어진 제1홈과, The annular body is a first groove made of a pair of symmetrical structure in which no empty space is formed by the purchase of the first permanent magnet, 상기 제2영구자석이 매입된 상태에서 상기 제2영구자석의 끝에서 빈공간을 형성하는 대칭구조의 한쌍으로 이루어진 제2홈과, A second groove having a pair of symmetrical structures forming an empty space at the end of the second permanent magnet in a state where the second permanent magnet is embedded; 상기 제1홈에 이격된 위치에서 빈 공간을 이루고 대칭구조의 한쌍으로 이루어진 부가홈과, An additional groove which forms an empty space at a position spaced apart from the first groove and consists of a pair of symmetrical structures; 상기 부가홈의 사이에서 U자 단면형상으로 상기 환형바디에 매입된 상기 제1·2영구자석에 도달하지 않는 깊이로 파여진 간격홈A gap groove recessed to a depth not reaching the first and second permanent magnets embedded in the annular body in a U-shaped cross section between the additional grooves. 을 포함해 구성된 것을 특징으로 하는 하이브리드 구동모터의 회전자.Rotor of the hybrid drive motor, characterized in that configured to include. 청구항 1에 있어서, 상기 간격홈은 서로 간격을 둔 한쌍의 좌·우단면홈으로 구성한 것을 특징으로 하는 하이브리드 구동모터의 회전자.The rotor of claim 1, wherein the spacer groove comprises a pair of left and right end grooves spaced apart from each other. 삭제delete 삭제delete 삭제delete 청구항 1에 있어서, 상기 부가홈은 위쪽으로 갈수록 테이퍼(Taper)진 단면 형상을 이루는 것을 특징으로 하는 하이브리드 구동모터의 회전자. The rotor of claim 1, wherein the additional groove has a tapered cross-sectional shape toward an upward direction. 청구항 6에 있어서, 상기 부가홈은 쌍을 이루는 좌·우 영구자석을 매입하지 않은 환형바디의 구간으로 파여진 U자 단면형상의 간격홈의 깊이까지 형성된 것을 특징으로 하는 하이브리드 구동모터의 회전자. The rotor of claim 6, wherein the additional groove is formed to a depth of a U-shaped cross-sectional groove formed in a section of an annular body in which paired left and right permanent magnets are not embedded.
KR1020090083941A 2009-09-07 2009-09-07 Rotor of driven motor for Hybrid Electric Vehicle KR101072025B1 (en)

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KR20230070637A (en) 2021-11-15 2023-05-23 보그워너디티씨 유한책임회사 Rotor for hybrid motor

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KR101897301B1 (en) 2012-12-11 2018-09-10 현대자동차주식회사 Interior permanent magnet synchronous motor
KR20150078467A (en) 2013-12-30 2015-07-08 현대자동차주식회사 Rotor for interior permanent magnet motor

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JP2000184640A (en) * 1998-12-09 2000-06-30 Aichi Emerson Electric Co Ltd Permanent-magnet rotor
JP2009112166A (en) * 2007-10-31 2009-05-21 Fujitsu General Ltd Magnet embedded rotor, motor using the rotor, and compressor using the motor

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JP2000184640A (en) * 1998-12-09 2000-06-30 Aichi Emerson Electric Co Ltd Permanent-magnet rotor
JP2009112166A (en) * 2007-10-31 2009-05-21 Fujitsu General Ltd Magnet embedded rotor, motor using the rotor, and compressor using the motor

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20230070637A (en) 2021-11-15 2023-05-23 보그워너디티씨 유한책임회사 Rotor for hybrid motor

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