WO2020042725A1 - Moteur à aimants permanents - Google Patents

Moteur à aimants permanents Download PDF

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Publication number
WO2020042725A1
WO2020042725A1 PCT/CN2019/091263 CN2019091263W WO2020042725A1 WO 2020042725 A1 WO2020042725 A1 WO 2020042725A1 CN 2019091263 W CN2019091263 W CN 2019091263W WO 2020042725 A1 WO2020042725 A1 WO 2020042725A1
Authority
WO
WIPO (PCT)
Prior art keywords
permanent magnet
stator
stator tooth
permanent
magnet motor
Prior art date
Application number
PCT/CN2019/091263
Other languages
English (en)
Chinese (zh)
Inventor
吴迪
张磊
Original Assignee
广东威灵电机制造有限公司
美的威灵电机技术（上海）有限公司
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
Priority claimed from CN201810980283.9A external-priority patent/CN110867987A/zh
Priority claimed from CN201810981014.4A external-priority patent/CN110867988A/zh
Application filed by 广东威灵电机制造有限公司, 美的威灵电机技术（上海）有限公司 filed Critical 广东威灵电机制造有限公司
Publication of WO2020042725A1 publication Critical patent/WO2020042725A1/fr

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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
    • H02K1/12—Stationary parts of the magnetic circuit
    • H02K1/14—Stator cores with salient poles
    • 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
    • H02K16/00—Machines with more than one rotor or stator

Definitions

  • the present invention relates to electrical equipment, and in particular, to a permanent magnet motor.
  • the magnetic flux of the permanent magnets of the rotor basically enters the stator teeth along the radial direction of the motor.
  • the object of the present invention is to overcome the problem that the existing technology cannot effectively increase the magnetic flux of a permanent magnet entering a stator core, and provides a permanent magnet motor that can increase the magnetic flux of a permanent magnet entering a stator core.
  • the present invention provides a permanent magnet motor.
  • the permanent magnet motor includes:
  • a stator iron core which includes a stator yoke portion and a plurality of stator tooth portions, and the plurality of stator tooth portions are spaced apart along a circumferential direction of the ring-shaped stator yoke portion;
  • a rotor including a permanent magnet holder and a plurality of permanent magnets mounted on the permanent magnet holder, the permanent magnet holder including a main body extending in an axial direction of the rotor, and a plurality of the permanent magnets
  • the permanent magnets are arranged at intervals along the circumferential direction of the body, and each of the permanent magnets has a side facing the stator teeth, and the side of at least one of the permanent magnets is provided at least partially with an axial end of the stator teeth
  • the portions correspond to each other to provide the stator teeth with a magnetic flux having a component in an axial direction of the permanent magnet motor.
  • the portion side surface of the permanent magnet at least partially correspond to the axial end portion of the stator tooth portion, the portion side surface can provide the stator tooth portion with a magnetic flux having a component in the axial direction of the permanent magnet motor.
  • the total flux of permanent magnets entering the teeth of the stator can be increased without making more complicated adjustments to the size and structure of the permanent magnet motor.
  • FIG. 1 is a perspective view of an embodiment of a permanent magnet motor of the present invention
  • FIG. 2 is an exploded perspective view of a main part of the permanent magnet motor of FIG. 1;
  • Figure 3 is a sectional view of the permanent magnet motor of Figure 1;
  • Figure 4 is a top view of Figure 3;
  • FIG. 5 is a sectional view taken along line A-A in FIG. 3;
  • FIG. 6 is a sectional view taken along line B-B in FIG. 3;
  • FIG. 7 is a view of a stator yoke punch in FIG. 1;
  • FIG. 8 is a view of a stator tooth punch in FIG. 2;
  • FIG. 9 is a perspective view of an embodiment of the permanent magnet motor of the present invention as an outer rotor motor
  • FIG. 10 is an exploded perspective view of a main part of the permanent magnet motor of FIG. 9;
  • FIG. 11 is a plan view of FIG. 9;
  • FIG. 12 is a front view of FIG. 9;
  • FIG. 13 is a sectional view taken along the line C-C in FIG. 11;
  • FIG. 14 is a cross-sectional view taken along line D-D in FIG. 12;
  • FIG. 15 is a view of a stator yoke punch in FIG. 9;
  • FIG. 16 is a view of a stator tooth punch in FIG. 9;
  • FIG. 17 is a perspective view of a permanent magnet motor according to another embodiment of the present invention.
  • FIG. 18 is an exploded perspective view of the main body portion of FIG. 17; FIG.
  • FIG. 19 is a top view of the permanent magnet motor of FIG. 17;
  • FIG. 20 is a front view of the permanent magnet motor of FIG. 17;
  • 21 is a sectional view taken along line E-E in FIG. 19;
  • FIG. 22 is a sectional view taken along the line F-F in FIG. 20;
  • FIG. 23 is a schematic diagram of a stator yoke punch in FIG. 18; FIG.
  • FIG. 24 is a schematic diagram of a stator tooth punch in FIG. 18;
  • FIG. 25 is a front view of the permanent magnet holder in FIG. 18;
  • 26 is a perspective view of another embodiment of the permanent magnet motor of the present invention as an outer rotor motor;
  • FIG. 27 is an exploded perspective view of a main part in FIG. 26; FIG.
  • Figure 28 is a top view of the permanent magnet motor of Figure 26;
  • Figure 29 is a front view of the permanent magnet motor of Figure 26;
  • FIG. 30 is a cross-sectional view taken along line G-G in FIG. 28;
  • Fig. 31 is a sectional view taken along line H-H in Fig. 29;
  • FIG. 32 is a top view of the permanent magnet holder in FIG. 27;
  • FIG. 34 is a schematic diagram of a stator yoke punch in FIG. 27;
  • 35 is a schematic diagram of a stator tooth punch in FIG. 27;
  • 36 is an exploded perspective view of a main part of a permanent magnet motor according to another embodiment of the present invention.
  • Figure 38 is a front view of the permanent magnet motor of Figure 36;
  • Fig. 39 is a sectional view taken along the line K-K in Fig. 37;
  • Fig. 40 is a sectional view taken along the line L-L in Fig. 38.
  • orientation words such as “up, down, left, and right” are used to refer to the up, down, left, and right directions shown in the drawings; It refers to the inside and outside of the outline of each component.
  • a plurality means two or more (including two).
  • the present invention provides a permanent magnet motor, wherein the permanent magnet motor includes a stator core 200 including a stator yoke portion 210 and a plurality of stator tooth portions 220, and the plurality of stator tooth portions 220
  • the stator yoke portion 210 is arranged at intervals along the circumferential direction of the ring.
  • the rotor 100 includes a permanent magnet holder 110 and a plurality of permanent magnets 120 mounted on the permanent magnet holder 110.
  • the holder 110 includes a main body 111 extending in the axial direction of the rotor 100.
  • a plurality of the permanent magnets 120 are disposed at intervals along the circumferential direction of the main body 111.
  • Each of the permanent magnets 120 has a tooth portion facing the stator.
  • a side surface of 220, the side surface of at least one of the permanent magnets 120 is disposed at least partially corresponding to an axial end of the stator tooth portion 220, that is, has an air gap corresponding to provide the stator tooth portion 220 with The magnetic flux of the component of the magneto-axial direction.
  • the permanent magnet 120 can be provided in any form on the basis that at least part of the side surface thereof corresponds to the axial end interval of the stator teeth 220, so that at least part of the side surface of the permanent magnet 120 can be directed to the stator teeth 220 provides a magnetic flux with a component along the axial direction of the permanent magnet motor, so the magnetic flux of the permanent magnet into the stator teeth can be increased without making more complicated adjustments to the size and structure of the permanent magnet motor. Total.
  • the permanent magnet 120 includes a plurality of first permanent magnets 121 and at least one second permanent magnet 122.
  • the plurality of first permanent magnets 121 are disposed along a circumferential direction of the main body 111.
  • At least one of the second permanent magnets 122 is disposed along at least one side of at least one of the first permanent magnets 121 in the axial direction and corresponds to the at least one first permanent magnet 121 in the axial direction.
  • At least one of the second permanent magnets 122 is disposed to correspond to the axial end of the stator tooth 220 at intervals;
  • the polarities of the first permanent magnet 121 and the second permanent magnet 122 corresponding to the axial direction are the same.
  • the magnetic flux of the at least one second permanent magnet 122 can enter the stator teeth 220 from the axial direction of the permanent magnet motor, thereby increasing The total amount of magnetic flux entering the teeth of the stator of the permanent magnet 120.
  • At least one of the stator teeth 220 includes a first surface 223 capable of correspondingly spaced from the first permanent magnet 121 and a second surface 224 capable of correspondingly spaced from the second permanent magnet 122.
  • the magnetic flux of the permanent magnet of the present invention is divided into two parts.
  • the magnetic flux of the first permanent magnet 121 can enter the stator tooth 220 from the radial direction of the permanent magnet motor through the first surface 223.
  • the first The magnetic flux of the two permanent magnets 122 can enter the stator teeth 220 from the axial direction of the permanent magnet motor through the second surface 224.
  • the second permanent magnet 122 it is possible to increase the magnetic flux that enters the stator teeth 220 from the axial direction. Therefore, it is possible to increase the permanent magnets entering the stator teeth without making more complicated adjustments to the size and structure of the permanent magnet motor The total magnetic flux of the section 220.
  • the stator core 200 may form the stator yoke portion 210 and the stator tooth portion 220 in various appropriate manners.
  • a plurality of punches having a first portion corresponding to the stator yoke portion 210 and a second portion corresponding to the stator tooth portion 220 may be formed. Sheets are laminated.
  • the stator yoke portion 210 includes a plurality of layers laminated in a direction along a center line of the stator yoke portion 210.
  • the stator yoke part 211, the stator tooth part 220 includes a plurality of laminated stator tooth part punches 221, and the lamination direction of the plurality of stator tooth part punches 221 is set such that The second surface 224 is perpendicular to the axial direction.
  • the stator yoke part 210 and the stator tooth part 220 can be formed by respectively laminating the stator yoke part punch 211 and the stator tooth part punch 221, and the stator yoke part 210 and the stator tooth part 220 can be subsequently assembled to obtain the stator Iron core 200.
  • the lamination direction of the stator tooth punches 221 is set so that the thickness direction of the stator tooth punches 221 is perpendicular to the axial direction, and thus, magnetic flux can enter the stator from the side of each stator tooth punches 221.
  • the tooth portion 220 does not affect the effect of the magnetic flux entering the stator tooth portion 220 because the entering direction of the magnetic flux is consistent with the superimposing direction of the stator tooth punching piece 221.
  • the first surface 223 is the inner surface of the stator teeth 220 along the annular shape surrounded by the stator yoke 210
  • the second surface 224 is the end surface of the stator teeth 220 in the axial direction.
  • this arrangement can increase the magnetic flux entering the stator teeth 220.
  • the first surface 223 and the first permanent magnet 121 correspond in parallel, that is, the first surface 223 surrounds the first permanent magnet 121;
  • the second surface 224 corresponds to the second permanent magnet 122 in parallel, that is, the second surface 224 is disposed perpendicular to the axial direction.
  • the stator tooth punching pieces 221 can be divided into a plurality of groups of laminated pressures to form a plurality of stator tooth portions 220 spaced apart along the circumferential direction of the stator yoke portion 210. In order to make the thickness direction of the stator tooth punches 221 perpendicular to the axial direction, the stator tooth punches 221 may be laminated along the circumferential direction of the stator yoke 210.
  • the stator tooth punch 221 has a notch 222 for mating with the stator yoke 210.
  • the stator yoke portion punching piece 211 may have a ring shape, so that a ring-shaped stator yoke portion 210 is formed by lamination.
  • the notch 222 may be provided on a surface of the stator tooth punch 221 opposite to the first surface 223 so as not to interfere with the magnetic flux of the first permanent magnet 121 and the second permanent magnet 122 entering the stator tooth 220.
  • the rotor 100 includes a plurality of the second permanent magnets 122 arranged at intervals along the circumferential direction of the main body 111.
  • both the second permanent magnet 122 and the first permanent magnet 121 may be uniformly distributed along the circumferential direction of the main body 111.
  • the first permanent magnet 121 and the second permanent magnet 122 may have a one-to-one correspondence, that is, each of the first permanent magnets 121 corresponds to the second permanent magnet 122 in the axial direction.
  • the polarities of the circumferentially adjacent first permanent magnets 121 are opposite, and the polarities of the circumferentially adjacent second permanent magnets 122 are also opposite.
  • the first permanent magnet 121 and the second permanent magnet 122 may not have a one-to-one correspondence relationship. For example, one first permanent magnet 121 spaced in a weekly direction may correspond to one second permanent magnet 122.
  • the polarities of the circumferentially adjacent first permanent magnets 121 are opposite, but the polarities of the circumferentially adjacent second permanent magnets 122 are the same.
  • the second permanent magnets 122 may also be arranged in an arbitrary manner to correspond to different first permanent magnets 121 and set its own polarity according to the polarity of the corresponding first permanent magnets 121.
  • the first permanent magnet 121 and / or the second permanent magnet 122 are blocks having a cross-section in the shape of a fan ring, wherein: a plurality of the first permanent magnets 121 are located on the same circumference, and / Alternatively, the plurality of second permanent magnets 122 located on the same side of the first permanent magnet 121 are located on the same circumference.
  • the first permanent magnet 121 and the second permanent magnet 122 can surround the main body 111 as much as possible, thereby increasing the corresponding area with the stator teeth 220 and increasing the magnetic flux entering the stator teeth 220. Specifically, as shown in FIG. 2, FIG. 5, FIG. 9, and FIG.
  • the first permanent magnet 121 and the second permanent magnet 122 are both block-shaped blocks in cross section, and the first permanent magnet 121 is along the main body 111. Most extend to cover the outer surface (inner rotor motor shown in FIG. 2) or inner surface (outer rotor motor shown in FIG. 9) of the main body 111 as much as possible, and the second permanent magnet 122 is located at both ends of the main body 111 so that The space occupied in the axial direction of the main body 111 is reduced while surrounding the two ends of the main body 111 as much as possible, thereby taking into consideration the radial magnetic flux from the first magnet 120 and the axial magnetic flux from the second magnet 130.
  • each of the first permanent magnets 121 corresponds to the second permanent magnets 122 on both sides in the axial direction.
  • the magnetic flux of the second permanent magnet 122 can enter from both ends of the stator teeth 220 in the axial direction.
  • the second surface 224 and the projection of the second permanent magnet 122 in the axial direction overlap.
  • a part of the stator teeth 220 extends between the second permanent magnets 122 on both sides in the axial direction, so that the top of the stator teeth 220 The surface and the bottom surface (ie, the second surface 224) and the projection of the second permanent magnet 122 in the axial direction have overlapping portions.
  • the top surface and the bottom surface (that is, the second surface 224) of the stator tooth portion 220 also have a portion that overlaps with the projection of the second permanent magnet 122 in the axial direction.
  • the projection overlap of the second surface 224 and the second permanent magnet 122 in the axial direction should be understood as the moment when the stator teeth 220 cut the magnetic field lines of the second permanent magnet 122 during the rotation of the rotor 100.
  • the second surface 224 of the stator tooth 220 and the second permanent magnet 122 have a projection overlap portion in the axial direction.
  • the second permanent magnet 122 may be located outside the axial direction of the stator teeth 220 as shown in FIG. 3 and FIG. 13, but may also be located inside the axial direction of the stator teeth 220 as long as the stator teeth 220
  • the second surfaces 224 may be spaced apart to form an axial air gap.
  • the main body 111 may be in the shape of a rotator, and at the same time, for the convenience of providing the first permanent magnet 121 and the second permanent magnet 122, the permanent magnet holder 110 includes first protrusions located on both sides of the main body 111 in the axial direction.
  • the second permanent magnet 122 is disposed on the first flange 112 and / or the second flange 113 toward the main body. 111 on the surface. That is, when the second permanent magnet 122 is provided only on the axial side of the stator tooth 220, the second permanent magnet 122 may be provided on the first flange 112 or the second flange 113 facing the main body 111.
  • the second permanent magnets 122 may be respectively disposed on the main body of the first flange 112 and the second flange 113 111 on the surface.
  • the permanent magnet motor may be an inner rotor motor.
  • the first permanent magnet 121 is disposed on the stator core 200. Inside the annular space. Among them, the stator yoke part 210 is located radially outside the stator tooth part 220, and the first permanent magnet 121 is located radially inside the stator tooth part 220 and has a radial gap with the stator tooth part 220.
  • the main body 111 may be cylindrical, and the first permanent magnet 121 is provided around the outer peripheral surface of the main body 111.
  • the permanent magnet motor of the present invention may be an outer rotor motor.
  • the first permanent magnet 121 is disposed outside the stator core 200.
  • the stator yoke part 210 is located radially inward of the stator tooth part 220
  • the first permanent magnet 121 is located radially outward of the stator tooth part 220 and has a radial gap with the stator tooth part 220.
  • the main body 111 is a hollow cylindrical structure, the first flange 112, the second flange 113, and the main body 111 each have an opening communicating with each other, and the first permanent magnet 121 is provided around the inner peripheral surface of the main body 111.
  • a first positioning groove is provided on an inner wall of the main body 111.
  • the first flange 112 and / or the second flange 113 may be provided with a second positioning groove.
  • the first permanent magnet 121 and the second permanent magnet 122 may be mounted on the permanent magnet holder 110 in an appropriate manner, for example, fixed by injection molding or the like.
  • a portion of the side surface of the permanent magnet 120 corresponding to an axial end interval of a stator tooth portion to provide an axial component of magnetic flux is oriented toward the The tapered surface 120 a of which the end of the permanent magnet 120 is tapered or the curved surface 120 b bent away from the axial direction toward the end of the permanent magnet 120.
  • the tapered surface 120a or the curved surface 120b corresponds to the axial end of the stator tooth 220 at intervals.
  • the tapered surface 120a or the curved surface 120b corresponds to the axial end of the stator tooth 220 at intervals.
  • the stator teeth 220 provide a magnetic flux having a component along the axial direction of the permanent magnet motor, so that it is possible to increase the entry of permanent magnets into the stator teeth without requiring more complicated adjustments to the size and structure of the permanent magnet motor. Total magnetic flux.
  • the permanent magnet 120 since the permanent magnet 120 has a tapered surface 120a or a curved surface 120b, the normal direction of the side surface of the permanent magnet 120 at any position on the tapered surface 120a or the curved surface 120b (that is, the direction perpendicular to the plane where the position is located) has an axial direction.
  • the component, that is, the magnetic flux of the permanent magnet 120 may have a component in the axial direction, so that the magnetic flux entering the stator teeth 220 in the axial direction can be increased.
  • each of the permanent magnets 120 has the tapered surface 120a or the curved surface 120b.
  • the axial end portion of the stator tooth portion 220 may have various appropriate structures, for example, it may have an end surface perpendicular to the axial direction to receive the axial direction magnetic flux component of the permanent magnet 120.
  • the axial end portion of the stator tooth portion 220 is provided on the side close to the permanent magnet 120 corresponding to the tapered surface 120a.
  • the axial end portion of the stator tooth 220 may be set to match the shape of the tapered surface 120a or the curved surface 120b at a portion opposite to the tapered surface 120a or the curved surface 120b, so that substantially all of the tapered surface 120a or the curved surface 120b is received Magnetic flux.
  • the stator core 200 may form the stator yoke portion 210 and the stator tooth portion 220 in various appropriate manners.
  • a plurality of first portions having corresponding stator yoke portions 210 and corresponding stator tooth portions may be formed.
  • the punch of the second part of 220 is laminated.
  • the stator yoke portion 210 is shown in FIG. 17, FIG. 22, FIG. 23, FIG. 24, FIG. 27, FIG. 30, FIG. 34, FIG. 35, FIG. 36, and FIG.
  • the stator tooth portion 220 includes a plurality of stator yoke punch pieces 221 laminated in a direction along a center line of the stator yoke portion 210, and the stator tooth portion 220 includes a plurality of stator tooth punch pieces 221 laminated.
  • the lamination direction of the punching pieces 221 is set such that the thickness direction of the stator tooth punching pieces 221 is perpendicular to the axial direction.
  • the stator yoke part 210 and the stator tooth part 220 can be formed by respectively laminating the stator yoke part punch 211 and the stator tooth part punch 221, and the stator yoke part 210 and the stator tooth part 220 can be subsequently assembled to obtain the stator. Iron core 200.
  • the lamination direction of the stator tooth punches 221 is set so that the thickness direction of the stator tooth punches 221 is perpendicular to the axial direction, and thus, magnetic flux can enter the stator from the side of each stator tooth punches 221.
  • the tooth portion 220 does not affect the effect of the magnetic flux entering the stator tooth portion 220 because the entering direction of the magnetic flux is consistent with the superimposing direction of the stator tooth punching piece 221.
  • the stator tooth punching pieces 221 can be divided into a plurality of groups of laminated pressures to form a plurality of stator tooth portions 220 spaced apart along the circumferential direction of the stator yoke portion 210. In order to make the thickness direction of the stator tooth punches 221 perpendicular to the axial direction, the stator tooth punches 221 may be laminated along the circumferential direction of the stator yoke 210.
  • the stator tooth punch 221 may have a hypotenuse 221a forming the tapered surface portion or an arc edge 221b forming the curved surface portion.
  • the hypotenuse edge 221a or the arc edge 221b is laminated to form a tapered surface portion or a curved surface portion to correspond to the tapered surface 120a or the curved surface 120b.
  • the angle between the hypotenuse 221a and the axial direction and the generatrix of the tapered surface 120a and The difference between the included angles in the axial direction is within 5 °.
  • the stator teeth 220 are respectively provided with permanent magnets 120 on both sides in the axial direction, and the two permanent magnets 120 are symmetrically arranged and each has a tapered surface 120a.
  • the included angle between the generatrices of the tapered surface 120a can be ⁇ 1
  • the stator tooth punch 221 has beveled sides 221a on both sides
  • the included angle between the beveled sides 221a on both sides can be ⁇ 2, where ⁇ 2 can be ⁇ 1 ⁇ 10 °.
  • the stator tooth punch 221 has a notch 222 for mating with the stator yoke 210.
  • the stator yoke portion punching piece 211 may have a ring shape, so that a ring-shaped stator yoke portion 210 is formed by lamination.
  • the notch 222 may be provided on a surface of the stator tooth punch 221 facing away from the permanent magnet 120 so as to prevent the magnetic flux of the permanent magnet 120 from entering the stator tooth 220.
  • the permanent magnet motor of the present invention may be an outer rotor motor or an inner rotor motor. specific:
  • the permanent magnet motor is an inner rotor motor
  • the main body 111 is a columnar member
  • the stator yoke portion 210 is located at the stator tooth portion 220.
  • Radially outside, the permanent magnet 120 is located in an annular space surrounded by the stator core 200.
  • the outer peripheral surface of the main body 111 has a first tapered surface portion 111a that is tapered toward its end (in the embodiment shown in Figs. 17 to 25, the first tapered surface portion 111a is a shape that expands toward the end, but may be a shape that tapers toward the end.)
  • the permanent magnet 120 has the tapered surface 120a, and the tapered surface 120a surrounds the first tapered surface 111a correspondingly.
  • the surface of the permanent magnet 120 opposite to the tapered surface 120a may also be set in a tapered shape, so that the permanent magnet 120 forms a block with a uniform thickness, so as to make and fit the first tapered surface portion 111a for assembly.
  • the outer peripheral surface of the main body 111 has a first cylindrical surface 111b
  • the permanent magnet 120 has the curved surface 120b and a first corresponding to the first cylindrical surface 111b.
  • a curved surface, the first curved surface and the curved surface 120 b are respectively disposed on opposite surfaces of the permanent magnet 120.
  • the permanent magnet 120 can form a block having a uniform thickness, and can be assembled by fitting the first cylindrical surface 111b with the first arc surface.
  • the permanent magnet motor is an outer rotor motor
  • the main body 111 is a ring-shaped member (for example, a hollow cylindrical structure), wherein: the inner peripheral surface of the main body 111
  • the second tapered surface portion 111c is gradually tapered toward the end portion (in the embodiments shown in FIGS. 26 to 35, the second tapered surface portion 111c has a shape that expands outward toward the end portion, but may have a shape that tapers toward the end portion. ),
  • the permanent magnet 120 has the tapered surface 120a, and the tapered surface 120a surrounds the second tapered surface portion 111c correspondingly.
  • the surface of the permanent magnet 120 opposite to the tapered surface 120a may also be set in a tapered shape, so that the permanent magnet 120 forms a block with a uniform thickness, so as to facilitate the fabrication and assembly of the second tapered surface 111c.
  • the inner peripheral surface of the main body 111 may have a second cylindrical surface
  • the permanent magnet 120 has the curved surface 120b and a second arc surface corresponding to the second cylindrical surface, and the second arc
  • the surface and the curved surface 120 b are respectively disposed on opposite surfaces of the permanent magnet 120.
  • the permanent magnet 120 can form a block having a uniform thickness, and can be assembled by fitting the second arc surface to the second cylindrical surface.
  • the tapered surface portion or the curved surface portion of the stator tooth 220 need only overlap with the projection of the tapered surface 120a or the curved surface 120b in the axial direction.
  • the permanent magnet 120 may be located on the axially outer side of the stator teeth 220, and the stator tooth punches 221 may form a V shape on the side corresponding to the permanent magnet 120.
  • the permanent magnet 120 may be located on the axially inner side of the stator tooth 220, and the stator tooth punch 221 may be formed in a Y shape on the side corresponding to the permanent magnet 120.
  • stator tooth 220 in the axial direction may correspond to the tapered surface 120a or the curved surface 120b to receive magnetic flux from the one end in the axial direction.
  • the stator teeth 220 may correspond to the tapered surface 120a or the curved surface 120b of the permanent magnet 120 at both ends in the axial direction to receive magnetic flux from both ends in the axial direction.
  • the stator teeth 220 include a first axial end portion and a second axial end portion on both axial sides thereof
  • the permanent magnet 120 includes The first permanent magnet 121 corresponding to the first axial end of the at least one stator tooth 220 and the second permanent magnet 122 corresponding to the second axial end of the at least one stator tooth 220, the first A permanent magnet 121 and a second permanent magnet 122 are respectively mounted on the main body 111.
  • the first permanent magnet 121 and the second permanent magnet 122 may have a tapered surface 120a or a curved surface 120b.
  • the first permanent magnet 121 may have a tapered surface 120a
  • the second permanent magnet 122 may have a curved surface 120b
  • the stator tooth punching piece 221 may have a hypotenuse 221a and a curved edge 221b at a corresponding axial end.
  • the number of the first permanent magnets 121 and the second permanent magnets 122 is at least one to allow the stator teeth 220 to receive magnetic flux from both ends in the axial direction.
  • One of the magnets 122 may correspond to the first permanent magnet 121 and the second permanent magnet 122 at both ends in the axial direction.
  • the polarities of the first permanent magnet 121 and the second permanent magnet 122 corresponding in the axial direction that is, corresponding to the same stator tooth 220) are the same.
  • the permanent magnet 120 includes a plurality of the first permanent magnets 121 arranged around the same circumference and / or a plurality of second permanent magnets 122 arranged around the same circumference. That is, in the case of having a plurality of first permanent magnets 121 and / or a plurality of second permanent magnets 122, the plurality of first permanent magnets 121 are disposed around the same circumference, and / or, the plurality of second permanent magnets 122 It is arranged around the same circumference, so that the plurality of first permanent magnets 121 and / or the plurality of second permanent magnets 122 surround the entire circumferential direction of the main body 111 as much as possible to increase the total amount of magnetic flux provided.
  • the plurality of first permanent magnets 121 and / or the plurality of second permanent magnets 122 are evenly distributed around their respective circumferences. Among them, the polarities of the circumferentially adjacent first permanent magnets 121 are opposite, and the polarities of the circumferentially adjacent second permanent magnets 122 are opposite.
  • a surface of the stator tooth 220 that is radially opposite to the permanent magnet 120 includes one end from the axial direction to the other end A continuous curved surface, and the curved surface 120b of the permanent magnet 120 corresponds to the shape of the curved surface.
  • FIG. 36 in the embodiment shown in FIG.
  • the curved surface of the stator teeth 220 is a convex shape, and the curved surface 120b is a concave shape (that is, toward the end of the permanent magnet 120) Outside the axial direction), but the curved surface of the stator teeth 220 can be concave and the curved surface 120b can be convex (that is, the end of the permanent magnet 120 is deviated inward from the axial direction).
  • the part 220 is easy to manufacture, and can receive the magnetic flux of the permanent magnet 120 (including the magnetic flux of the radial component and the magnetic flux of the axial component) through an arc surface; one permanent magnet 120 can oppose the axial two of the stator tooth 220 The end provides a magnetic flux with an axial component.
  • the permanent magnet motor includes a plurality of permanent magnets 120, and the plurality of permanent magnets 120 may be disposed along a circumferential direction of the main body 111 and correspond to the stator teeth 220 one-to-one.
  • the permanent magnet 120 may be mounted on the permanent magnet holder 110 by an appropriate method, for example, fixed by injection molding or the like.
  • the permanent magnet motor of the present invention can increase the total magnetic flux entering the stator teeth 220 by increasing the magnetic flux of the axial component.
  • the structure does not need to be complicatedly adjusted, and the size of the permanent magnet motor does not need to be increased. Both cost and efficiency are taken into consideration.

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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 le domaine de l'équipement électrique et, plus particulièrement, un moteur à aimants permanents. Le moteur à aimants permanents comprend : un noyau de stator comprenant une culasse de stator et une pluralité de dents de stator, la pluralité de dents de stator étant disposées de manière circonférentielle le long de la culasse de stator annulaire à des intervalles ; et un rotor comprenant un support d'aimants permanents et une pluralité d'aimants permanents montés sur le support d'aimants permanents. Le support d'aimants permanents comprend un corps s'étendant dans la direction axiale du rotor. La pluralité d'aimants permanents est disposée de manière circonférentielle le long du corps à des intervalles. Chaque aimant permanent a un côté orienté vers les dents de stator. Le côté d'au moins un aimant permanent correspond au moins partiellement à des parties d'extrémité axiales des dents de stator à des intervalles, pour fournir un flux magnétique ayant une composante dans la direction axiale du moteur à aimants permanents. La présente invention peut fournir le flux magnétique ayant une composante dans la direction axiale du moteur à aimant permanent aux dents de stator par l'intermédiaire des côtés des aimants permanents, de façon à accroître le flux magnétique total entrant dans les dents de stator.
PCT/CN2019/091263 2018-08-27 2019-06-14 Moteur à aimants permanents WO2020042725A1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
CN201810980283.9A CN110867987A (zh) 2018-08-27 2018-08-27 永磁电机
CN201810981014.4 2018-08-27
CN201810980283.9 2018-08-27
CN201810981014.4A CN110867988A (zh) 2018-08-27 2018-08-27 永磁电机

Publications (1)

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WO2020042725A1 true WO2020042725A1 (fr) 2020-03-05

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2016005423A (ja) * 2014-06-19 2016-01-12 野上 忍 ステッピングモータ
CN205882877U (zh) * 2016-07-04 2017-01-11 湖南大学 一种混合磁路驱动电机
CN106712329A (zh) * 2016-12-15 2017-05-24 广东威灵电机制造有限公司 电机和具有其的水泵
CN207134965U (zh) * 2016-07-08 2018-03-23 艾默生电气公司 轴向磁通电机、用于该轴向磁通电机的定子组件及压缩机

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2016005423A (ja) * 2014-06-19 2016-01-12 野上 忍 ステッピングモータ
CN205882877U (zh) * 2016-07-04 2017-01-11 湖南大学 一种混合磁路驱动电机
CN207134965U (zh) * 2016-07-08 2018-03-23 艾默生电气公司 轴向磁通电机、用于该轴向磁通电机的定子组件及压缩机
CN106712329A (zh) * 2016-12-15 2017-05-24 广东威灵电机制造有限公司 电机和具有其的水泵

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