WO2014104820A1 - Rotor pour moteur - Google Patents

Rotor pour moteur Download PDF

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Publication number
WO2014104820A1
WO2014104820A1 PCT/KR2013/012318 KR2013012318W WO2014104820A1 WO 2014104820 A1 WO2014104820 A1 WO 2014104820A1 KR 2013012318 W KR2013012318 W KR 2013012318W WO 2014104820 A1 WO2014104820 A1 WO 2014104820A1
Authority
WO
WIPO (PCT)
Prior art keywords
rotor
main
holes
region
magnets
Prior art date
Application number
PCT/KR2013/012318
Other languages
English (en)
Korean (ko)
Inventor
정영호
이정호
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 WO2014104820A1 publication Critical patent/WO2014104820A1/fr

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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
    • 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

Definitions

  • the present invention relates to a rotor structure of a motor, and in particular, a rotor capable of effectively dissipating heat while concentrating more magnetic flux density by using a permanent magnet embedded by placing a permanent magnet in a single layer or multiple layers inside the rotor. It's about structure.
  • An energy converter that converts electrical energy into mechanical energy such as rotational or linear kinetic energy by using an electric field phenomenon, which is energy existing in nature, is called an electric motor (hereinafter referred to as a "motor").
  • Motors are an essential electric device for obtaining rotational force, and various motors have been researched and developed.
  • various motors have been researched and developed.
  • the compact, lightweight motor is inevitably added to the difficulty of dissipating heat generated inside by the rotational movement to the outside.
  • Figure 1 shows a conventional permanent magnet buried type rotor in the prior art, the permanent magnet buried type rotor shown is a straight portion groove 21 of a predetermined length at a right angle to the radial direction from the center of the rotor iron piece (2) Form symmetrically.
  • These straight part grooves 21 form a trough in the longitudinal direction of the rotating shaft when the rotor iron pieces 2 are stacked.
  • the magnetic field is generated by inserting the permanent magnet 30 as shown in FIG.
  • the buried type of the structure has a problem that the efficiency is lowered by a large amount of leakage magnetic flux generated at the end of the permanent magnet and excessive heat is generated when the rotor body laminated with the iron pieces (2) is rotated.
  • the present invention is to provide a rotor for a motor that can increase the power while reducing the weight of the motor.
  • Another object of the present invention is to provide a rotor for a motor having a structure capable of effectively dissipating heat generated from the inside to the outside while reducing the weight of the motor.
  • Another object of the present invention is to provide a design technology capable of achieving an output density improvement and a compact and lightweight structure as a high output high efficiency motor in a motor manufacturing technology.
  • Rotor for an electric motor according to the spirit of the present invention, the rotor body for rotating around the motor axis of rotation; A plurality of embedding magnets embedded in the circumferential side of the rotor body of the rotor body; And a plurality of main holes in which a part of the main body region between the embedded magnets and the motor rotation shaft is formed in a trapezoidal or arc-shaped band shape.
  • the plurality of half moon holes may be further formed in a region between the main holes in a circumferential direction that is longer in the circumferential direction than the main hole.
  • the half moon holes may be formed in at least one of a crescent shape, a half moon shape, a fan shape.
  • the embedded magnets may be rectangular parallelepiped magnets embedded in a position perpendicular to the radial direction in an area between the main hole and the circumference.
  • the embedded magnets one end is located near the center of the side of the main hole and the other end is located on the circumferential side of the region between the main holes, the rectangular parallelepiped whose cross section is arranged in a V-shape in the region between the main hole and the circumference Magnets.
  • the buried magnets are rectangular magnets embedded in the radially orthogonal position in the area between the main hole and the circumference, and one end is located near the center of the side of the main hole and the other end is the circumference of the area between the main holes.
  • the cross-section in the region between the main hole and the circumference may be rectangular parallelepiped magnets arranged in a V-shape.
  • the half moon holes may be formed before and after the radial direction of the fixing hole to which the means for fixing the stator is connected.
  • the motor is manufactured by the rotor for the motor of the above-described advantages, it is possible to cause the advantage of increasing the power while reducing the motor weight.
  • the rotor for a motor of the present invention has the advantage of having a structure capable of effectively dissipating heat generated from the inside to the outside while reducing the weight of the motor.
  • the rotor for a motor of the present invention can increase the power density without increasing the amount of magnets used, thereby reducing the cost.
  • the motor rotor of the present invention has the advantage of being able to effectively suppress heat generation without reducing the outer diameter size of the rotor.
  • the rotor for a motor of the present invention has an advantage of enabling a smaller and lighter weight than an output motor.
  • FIG. 1 is a plan view of a rotor iron plate forming a cross section of a rotor of a conventional permanent magnet buried type.
  • FIG. 2 is a perspective view of a permanent magnet embedded in a buried portion of the permanent magnet.
  • FIG 3 is a cross-sectional plan view showing a rotor for an electric motor according to an embodiment of the present invention.
  • Figure 4 is a cross-sectional plan view showing a rotor for an electric motor according to another embodiment of the present invention.
  • FIG. 5 is a pattern showing flux density and flux distribution while rotating the rotor shown in FIG. 3 with respect to a stator.
  • FIG. 6 is a pattern showing flux density and flux distribution while rotating the rotor shown in FIG. 4 with respect to a stator.
  • FIG. 7 is a graph showing torque characteristics of the rotor shown in FIG. 3 and the rotor shown in FIG. 4.
  • Figure 8 is a cross-sectional plan view showing a rotor for an electric motor according to another embodiment of the present invention.
  • Figure 9 is a cross-sectional plan view showing a rotor for an electric motor according to another embodiment of the present invention.
  • the rotor 120 for an electric motor includes: a rotor body 122 rotating around a motor rotation axis; A plurality of embedding magnets (127, 128, 129) embedded in the circumferential side of the rotor body 122 of the rotor body 122; And a plurality of main holes 124 in which a part of the main body region between the buried magnets 127, 128, 129 and the motor rotation shaft is formed in a trapezoidal or arc-shaped band shape.
  • the rotor body 122 is connected to the rotation shaft of the motor, and rotates in an annular space between the motor rotation shaft and the external stator.
  • the rotor body 122 forms a single frame in which the embedding slots and the holes 124 are formed, but in the actual manufacturing method, a plurality of pieces of iron are stacked. Form or a plurality of segments may have an assembled form.
  • the plurality of buried magnets 127, 128, and 129 may have a rectangular plank plank shape perpendicular to or near perpendicular to the radial direction in a region between the main holes and the circumference, as shown in cross section. It can play a role to connect the flux of flux from the stator.
  • three buried magnets 127, 128, and 129 are disposed for one magnetic pole, and for each magnetic pole, embedded in the area between the main hole 124 and the circumference at a position perpendicular to the radial direction.
  • the rectangular cuboid planks 129 and one end are located near the center of the side of the main hole and the other end is located at the circumferential side of the area between the main holes, and the cross section is arranged in a V shape in the area between the main holes and the circumference.
  • Two cuboid planks 127 and 129 may be disposed.
  • planks (127, 128, 129), which are already magnetized permanent magnets, also serve as magnetic flux barriers, but the magnetic force lines generated here should be designed to be mechanically appropriate while saturating the magnetically conductive web to limit the magnetic flux barrier.
  • two V-shaped magnets 127 and 128 having a V-shaped cross section on the rotational axis side are for a main function of the permanent magnet-embedded rotor. It plays the same role as the permanent magnet embedded in the rotor.
  • Parallel magnets 129 which are cuboid planks embedded at a position perpendicular to the radial direction, enhance the magnetic flux by the V-shaped magnets 127 and 128 and the external stator 160, It is responsible for adjusting the flow.
  • one main hole 124 is formed in which some of the rotor body regions are formed in a trapezoidal or arcuate band shape.
  • the main hole 124 has a main purpose to reduce the weight and / or rotational mass of the rotor, and to facilitate heat dissipation from the rotor.
  • the rotor 220 for an electric motor includes: a rotor body 222 rotating about a motor rotation axis; A plurality of embedded magnets (227, 228, 229) embedded in the circumferential side of the rotor body (222) with respect to the motor axis of rotation; And a plurality of main holes 224 in which a part of the main body region between the buried magnets 227, 228, and 229 and the motor rotation shaft is formed in a trapezoidal or arc-shaped band shape.
  • the rotor body 222 is connected to the rotating shaft of the motor, the appearance of a single frame structure that rotates in the annular space between the motor rotation shaft and the external stator, but in the actual manufacturing method in the form of a plurality of stacked pieces Or a plurality of segments may be assembled.
  • the plurality of buried magnets 227, 228, and 229 may have a rectangular plank plank shape perpendicular to or near perpendicular to a radial direction in a region between the main holes and the circumference, as shown in cross-section thereof. It is the same as the case of FIG. 3 such that it can play a role for connecting the flow of magnetic flux from the stator.
  • one main hole 224 is formed in which some of the rotor body regions are formed in a trapezoidal or arcuate band shape.
  • the main hole 224 has a main purpose to reduce the weight and / or rotational mass of the rotor, and to facilitate heat dissipation from the rotor.
  • a plurality of half moon holes 225 are formed in the circumferentially longer half moon shape in the circumferential area than the main hole 224. It can be seen that.
  • the shape of the half moon hole 225 is not limited to the crescent shape as shown in Fig. 4, it can be formed not only crescent shape, but also a half moon shape, a fan shape.
  • the half moon holes 225 are formed before and after the radial direction of the fixing hole 226 to which the means for fixing the rotor 220 is connected.
  • the fixing hole 226 is a half moon hole ( 225 may be configured to perform some role.
  • the half moon holes 225 are arranged in a radial direction in the form of half belonging to one magnetic pole region and the other half belonging to another magnetic pole region at the boundary between two adjacent magnetic poles.
  • the half moon holes may be formed in three or more in the radial direction of the boundary between the two adjacent magnetic poles.
  • the motor rotor shown in FIG. 4 is a rectangular body formed by a permanent magnet inserted into the rotor and fitted with a shaft to rotate to form a light weight on the rotor body and secure heat dissipation area / improved output density.
  • a permanent magnet inserted into the rotor and fitted with a shaft to rotate to form a light weight on the rotor body and secure heat dissipation area / improved output density.
  • trapezoidal or arc-shaped band-shaped and a crescent-shaped hole in which a magnetic flux path is formed closely so as to increase the concentration of magnetic flux. That is, a crescent shaped flux barrier groove is additionally formed on the pole boundary of the rotor between the adjacent flux barrier portions so that the flow of magnetic flux generated in the stator is more concentrated on the magnetic path without being lost on the pole boundary.
  • the flow rate of the motor improves the output of the motor by preventing the magnetic flux from leaking.
  • the motor rotor of the present invention shown in FIGS. 3 and 4 may include holes formed in a form in which a part of the rotor body is cut out.
  • the roles of the holes formed in the rotor body are as follows. .
  • the organic electromotive force generated by the stator causes the organic electromotive force to be induced by the holes in the desired direction so that the organic electromotive force flows in the rotor so that the organic electromotive force is prevented from being lost. .
  • the flow of magnetic flux around the adjacent pole interface is blocked and mainly losses are reduced.
  • the rotor in which the half moon-shaped hole is formed creates a smooth flow of magnetic flux.
  • FIG. 5 shows the flux density and the flux distribution while rotating the rotor shown in FIG. 3 with respect to the stator.
  • FIG. 5 shows the flux density and the flux distribution while rotating the rotor shown in FIG. 3 with respect to the stator.
  • FIG. 5 shows the flux density and the flux distribution while rotating the rotor shown in FIG. 3 with respect to the stator.
  • FIG. 5 In the magnetic flux distribution shown, it can be seen that there is no weakening of the magnetic flux for the rotational movement by the main hole formed in the rotor. That is, it can be seen that the formation of the main hole effectively performs heat dissipation without affecting the output of the motor and can reduce the weight of the rotor.
  • FIG. 6 shows the flux density and the flux distribution while the rotor shown in FIG. 4 is rotated with respect to the stator. Comparing the magnetic flux distribution of FIG. 6 with the magnetic flux distribution of FIG. 5, it can be seen that the leakage magnetic flux generated between the magnetic poles is effectively prevented. In addition, it can be seen that the magnetic flux density of FIG. 5 is 2.873 tesla, whereas the magnetic flux density of FIG. 6 is improved to 2.880 tesla.
  • the weight was 13.87kg when there are no holes, the main hole was formed to reduce the weight to 11.19kg, it can be seen that again achieved the reduction effect to 11.05 by forming a half moon hole.
  • FIG. 7 is a graph showing torque characteristics of the rotor shown in FIG. 3 and the rotor shown in FIG. 4. As shown, the torque characteristic of the rotor of FIG. 3 is 140.81 Nm, and the torque characteristic of the rotor of FIG. 4 is 140.87 Nm, which is slightly higher but the torque characteristic of the rotor of FIG. It can be seen that.
  • Table 1 below shows the same speed of the comparative example having a circular hole as a main hole in the rotor body, the embodiment of FIG. 3 with a trapezoidal main hole, and the embodiment of FIG. 4 with a trapezoidal main hole and a half moon hole, and It is for comparing torque at an angle.
  • Table 1 320 arms circle Trapezoid Trapezoid + crescent Speed [rpm] Angle [°] Torque [Nm] Angle [°] Torque [Nm] 2750 120 138.2 120 140.81 120 140.87
  • FIG. 8 shows a rotor for a motor according to another embodiment of the structure similar to that of FIG. 4, but with only one plank stone whose cross section is perpendicular to the radius of the axis of rotation of the magnet.
  • FIG. 9 is similar to the structure of FIG. 4, but includes an embedded magnet for one magnetic pole, one end of which is located near the center of the side of the main hole and the other end of which is located on the circumference side of the area between the main holes, and the area between the main holes and the circumference.
  • Fig. 3 shows a rotor for a motor according to another embodiment of a structure having two planks whose cross sections are arranged in a V shape.
  • the present invention relates to the rotor structure of a motor and can be used in the motor field.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Permanent Field Magnets Of Synchronous Machinery (AREA)
  • Iron Core Of Rotating Electric Machines (AREA)

Abstract

La présente invention concerne un rotor pour moteur électrique, pouvant comprendre : un corps de rotor tournant autour d'un axe de rotation de moteur ; de multiples aimants incorporés, qui sont incorporés dans le côté circonférentiel du corps de rotor, par rapport à l'axe de rotation de moteur ; et de multiples trous principaux, formés selon une bande trapézoïdale ou en forme d'arc dans une partie d'une région principale entre les aimants incorporés et l'axe de rotation de moteur. Le rotor peut en outre comprendre de multiples trous en forme de croissant formés dans une région entre les trous principaux de façon à ce que les trous en forme de croissant soient formés dans une direction circonférentielle dans la région plus proche de la circonférence que les trous principaux.
PCT/KR2013/012318 2012-12-28 2013-12-27 Rotor pour moteur WO2014104820A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
KR10-2012-0157643 2012-12-28
KR1020120157643A KR101426168B1 (ko) 2012-12-28 2012-12-28 모터의 회전자

Publications (1)

Publication Number Publication Date
WO2014104820A1 true WO2014104820A1 (fr) 2014-07-03

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ID=51021758

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/KR2013/012318 WO2014104820A1 (fr) 2012-12-28 2013-12-27 Rotor pour moteur

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KR (1) KR101426168B1 (fr)
WO (1) WO2014104820A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110380537A (zh) * 2019-07-22 2019-10-25 宁波华表机械制造有限公司 一种电机转子冲片及永磁驱动电机转子体及永磁驱动电机

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2006314152A (ja) * 2005-05-06 2006-11-16 Nissan Motor Co Ltd 永久磁石型電動機
KR20090089433A (ko) * 2007-02-22 2009-08-21 다이킨 고교 가부시키가이샤 모터 및 압축기
JP4660406B2 (ja) * 2005-09-07 2011-03-30 株式会社東芝 回転電機
WO2012014728A1 (fr) * 2010-07-27 2012-02-02 日産自動車株式会社 Rotor pour moteur électrique

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2006314152A (ja) * 2005-05-06 2006-11-16 Nissan Motor Co Ltd 永久磁石型電動機
JP4660406B2 (ja) * 2005-09-07 2011-03-30 株式会社東芝 回転電機
KR20090089433A (ko) * 2007-02-22 2009-08-21 다이킨 고교 가부시키가이샤 모터 및 압축기
WO2012014728A1 (fr) * 2010-07-27 2012-02-02 日産自動車株式会社 Rotor pour moteur électrique

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110380537A (zh) * 2019-07-22 2019-10-25 宁波华表机械制造有限公司 一种电机转子冲片及永磁驱动电机转子体及永磁驱动电机

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Publication number Publication date
KR101426168B1 (ko) 2014-08-04
KR20140087409A (ko) 2014-07-09

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