CN107276272B - Surface-mounted motor, surface-mounted motor rotor and stator - Google Patents
Surface-mounted motor, surface-mounted motor rotor and stator Download PDFInfo
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- CN107276272B CN107276272B CN201710676131.5A CN201710676131A CN107276272B CN 107276272 B CN107276272 B CN 107276272B CN 201710676131 A CN201710676131 A CN 201710676131A CN 107276272 B CN107276272 B CN 107276272B
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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
- H02K1/278—Surface mounted magnets; Inset magnets
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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
- H02K1/16—Stator cores with slots for windings
- H02K1/165—Shape, form or location of the slots
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K29/00—Motors or generators having non-mechanical commutating devices, e.g. discharge tubes or semiconductor devices
- H02K29/03—Motors or generators having non-mechanical commutating devices, e.g. discharge tubes or semiconductor devices with a magnetic circuit specially adapted for avoiding torque ripples or self-starting problems
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K2213/00—Specific aspects, not otherwise provided for and not covered by codes H02K2201/00 - H02K2211/00
- H02K2213/03—Machines characterised by numerical values, ranges, mathematical expressions or similar information
Abstract
The invention discloses a surface-mounted motor, a surface-mounted motor rotor and a stator, wherein magnetic steel (2) of the surface-mounted motor rotor is provided with an outer side face facing the stator (1), and two sides of the outer side face are provided with edge cutting structures symmetrically arranged along the center line of the outer side face. According to the surface-mounted motor rotor, the edge cutting structures symmetrically arranged along the central line of the outer side face are arranged on the two sides of the outer side face, so that the length of an air gap of the motor at each position along the inner circle surface of the stator can be changed, the air gap magnetic field is further improved, the air gap magnetic density and the counter potential waveform sine degree are improved, the harmonic duty ratio is reduced, the torque pulsation is further reduced, and the vibration noise of the motor is effectively reduced. The stator and the surface-mounted motor provided by the invention have the same technical effects as the rotor of the surface-mounted motor.
Description
Technical Field
The invention relates to the technical field of motor equipment, in particular to a surface-mounted motor, a surface-mounted motor rotor and a surface-mounted motor stator.
Background
The surface-mounted permanent magnet synchronous motor has the advantages of simple structure, easiness in vector control and the like, and is widely applied to a high-performance servo system and a low-speed high-torque propulsion system.
As shown in fig. 1, the surface-mounted motor comprises a surface-mounted motor rotor and a stator 01, wherein the surface-mounted motor rotor comprises a rotating shaft 04, a rotor core 03 and magnetic steel 02 arranged on the outer surface of the rotor core 03.
At present, the air gap flux density and the counter potential of the surface-mounted permanent magnet synchronous motor contain various spatial harmonics, and as the stator 01 of the surface-mounted permanent magnet synchronous motor is grooved, the magnetic circuit flux guide is uneven, the air gap flux density and the counter potential contain various spatial harmonics, the harmonic ratio is large, and various harmonics interact to generate low-order force waves, so that the vibration noise of the motor is increased. The waveform sine degree is poor, the waveform distortion rate is high, so that the vibration and noise of the motor are large, the use health of a user is affected, and the application and popularization of the motor are limited.
Therefore, how to reduce the vibration noise of the motor is a problem to be solved by those skilled in the art.
Disclosure of Invention
In view of the above, the present invention provides a surface-mounted motor rotor to reduce vibration noise of the motor. The invention also provides a surface-mounted motor rotor and a stator.
In order to achieve the above purpose, the present invention provides the following technical solutions:
the utility model provides a surface mounted motor rotor, surface mounted motor rotor's magnet steel has the lateral surface towards the stator, the both sides of lateral surface have along the side cut structure of its central symmetry setting.
Preferably, in the surface-mounted motor rotor, the trimming structure of the outer side surface is an eccentric cambered surface arranged on two sides of the middle cambered surface of the outer side surface, and the eccentric cambered surface is bent towards the inner side of the surface-mounted motor rotor;
and the eccentric cambered surface and the middle cambered surface are in smooth transition.
Preferably, in the surface-mounted motor rotor, the radian of the eccentric cambered surface is larger as the rotor is closer to a magnetic pole boundary line of the magnetic steel.
Preferably, in the surface-mounted motor rotor, the radian of the eccentric cambered surface is A/2, and the angle occupied by a single magnetic pole of the surface-mounted motor rotor is F;
0.7≥A/F≥0.25。
preferably, in the surface-mounted motor rotor, the number of magnetic pole pairs of the motor is P, and the radian of the eccentric cambered surface is A/2; the included angle between the eccentric arbitrary point connecting line and the eccentric connecting point connecting line is set as theta 3, the eccentric arbitrary point connecting line is a connecting line of an arbitrary point on the eccentric cambered surface and the circle center of the surface mounted motor rotor, the eccentric connecting point connecting line is a connecting line of a W connecting point and the circle center of the surface mounted motor rotor, and the W connecting point is a connecting point of the middle cambered surface and the eccentric cambered surface; the distance between any point on the eccentric cambered surface and the circle center of the surface-mounted motor rotor is an eccentric diameter R6; the eccentric diameter R6 and the radius R5 of the middle cambered surface meet the following relation:wherein/>。
Preferably, in the surface-mounted motor rotor, an angle of a gap between two adjacent magnetic steels (2) is C, and an angle occupied by a single magnetic pole of the surface-mounted motor rotor is F; C/F is more than or equal to 0.2 and more than or equal to 0.15.
The invention also provides a stator, the tooth shoes of the stator are provided with inner side faces facing to the rotor of the surface-mounted motor, and the two sides of the inner side faces are provided with edge cutting structures symmetrically arranged along the center line of the inner side faces.
Preferably, in the surface-mounted motor rotor, the trimming structure of the inner side surface is a curved tangential surface arranged on two sides of the middle surface of the inner side surface, and the curved tangential surface is curved towards the radial outer side of the stator.
Preferably, in the surface-mounted motor rotor, the radian of the curved section is G/2, and the angle occupied by a single tooth shoe of the stator is H;
0.7≥G/H≥0.4。
preferably, in the surface-mounted motor rotor, the number of slots on the stator is Q; the radian of the curve section is G/2; the included angle between the curve arbitrary point connecting line and the curve connecting point connecting line is set as theta 2, and the curve arbitrary point connecting line is a connecting line between any point on the curve tangent plane and the center of the stator circle; the curve connecting point connecting line is a connecting line of a T connecting point and the center of the stator, and the T connecting point is a connecting point of the middle surface and the curve tangential surface; the distance between any point on the curve tangent plane and the center of the stator is the stator trimming diameter R4; the stator trimming diameter R4 and the inner circle radius R3 of the stator satisfy the following relation:wherein->。
The invention also provides a surface-mounted motor, which comprises a surface-mounted motor rotor and a stator, wherein the surface-mounted motor rotor is the surface-mounted motor rotor according to any one of the above;
or, the stator is a stator as described in any one of the above.
According to the technical scheme, the surface-mounted motor rotor provided by the invention has the advantages that the edge cutting structures symmetrically arranged along the central line of the motor rotor are arranged on the two sides of the outer side surface, so that the length of an air gap of the motor along each position of the inner circle surface of the stator can be changed, the magnetic field of the air gap is further improved, the magnetic density of the air gap and the sine degree of counter potential waveforms are improved, the harmonic duty ratio is reduced, the torque pulsation is further reduced, and the vibration noise of the motor is effectively reduced.
The invention also provides a stator, the tooth shoe of the stator is provided with an inner side surface facing the surface-mounted motor rotor, and the two sides of the inner side surface are provided with trimming structures symmetrically arranged along the central line of the trimming structures. The length of the air gap at each position of the motor along the inner circular surface of the stator is also changed, and the technical effect is the same as that described above.
The invention also provides a surface-mounted motor. Since the surface-mounted motor has the surface-mounted motor rotor or the stator, and since the surface-mounted motor rotor and the stator have the technical effects described above, the motor having the surface-mounted motor rotor or the stator should have the same technical effects, and will not be described in detail herein.
Drawings
In order to more clearly illustrate the embodiments of the invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the invention, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of a prior art motor;
fig. 2 is a schematic structural diagram of a first surface-mounted motor according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram of a stator of a first surface-mounted motor according to an embodiment of the present invention;
fig. 4 is a schematic structural diagram of a first surface-mounted motor rotor according to an embodiment of the present invention;
fig. 5 is a schematic structural diagram of a second surface-mounted motor according to an embodiment of the present invention;
fig. 6 is a schematic structural diagram of a second surface-mounted motor rotor according to an embodiment of the present invention;
fig. 7 is a schematic structural diagram of a stator of a second surface-mounted motor according to an embodiment of the present invention;
fig. 8 is a torque ripple comparison chart of a tangential motor according to an embodiment of the present invention and a tangential motor according to the prior art.
Detailed Description
The invention discloses a surface-mounted motor rotor which is used for reducing vibration noise of a motor. The invention also provides a stator and a surface-mounted motor.
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Referring to fig. 2-4, an embodiment of the present invention provides a surface-mounted motor rotor, wherein a magnetic steel 2 of the surface-mounted motor rotor has an outer side surface facing a stator 1, and two sides of the outer side surface have edge trimming structures symmetrically arranged along a central line thereof.
According to the surface-mounted motor rotor provided by the embodiment of the invention, the edge cutting structures symmetrically arranged along the central line of the outer side surface are arranged on the two sides of the outer side surface, so that the length of an air gap of the motor at each position along the inner circle surface of the stator 1 can be changed, the air gap magnetic field is further improved, the magnetic density of the air gap and the sine degree of counter potential waveforms are improved, the harmonic duty ratio is reduced, the torque pulsation is further reduced, and the vibration noise of the motor is effectively reduced.
It will be appreciated that the trim structure is an edge structure after a portion of the existing solid structure has been cut away. The surface-mounted motor rotor comprises a rotating shaft 4, a rotor core 3 and magnetic steel 2.
As shown in fig. 2, 3 and 4, the trimming structure of the outer side surface is an eccentric cambered surface arranged at two sides of the middle cambered surface of the outer side surface, and the eccentric cambered surface is bent towards the inner side of the surface-mounted motor rotor; the eccentric cambered surface and the middle cambered surface are in smooth transition. In the present embodiment, the outer surface of the magnetic steel 2 of the surface-mounted motor rotor is cut off, and the structure of the stator 1 may be the same as that of the stator 1 in the related art. Wherein, the eccentric cambered surface is a cambered surface structure with the circle center not coincident with the circle center of the surface-mounted motor rotor.
Of course, the edge cutting structure of the outer side surface can also be provided as other structures, such as a plane.
Preferably, the closer the eccentric cambered surface is to the magnetic pole boundary line of the magnetic steel 2, the larger the radian of the eccentric cambered surface is. The connecting point of the eccentric cambered surface and the middle cambered surface is a W point, the eccentric arc changes along a curve function from the W point towards the magnetic pole boundary line direction, and the eccentric arc of the magnetic steel 2 extends along the circumferential direction. Through the arrangement, the air gap flux of the magnetic circuit is more uniform.
In the embodiment, the radian of the eccentric cambered surface is A/2, and the angle occupied by a single magnetic pole of the surface-mounted motor rotor is F. Simulation researches show that the ratio of the radian of the eccentric cambered surface to the radian of the middle cambered surface has a larger influence on the magnetic flux density harmonic wave of the air gap. The eccentric cambered surface is arranged on the magnetic steel 2, so that the magnetic pole shape of the magnetic steel 2 is changed, the magnetic pole of the magnetic steel 2 is in a salient pole shape, and then the lengths of air gaps at different positions on the surface of the rotor are changed. When A/F is more than or equal to 0.25, the length of the air gap at the two sides of the magnetic pole is increased, the flux of the air gap at the two sides of the magnetic pole is reduced, the flux density of the air gap at the two sides of the magnetic pole is further reduced, the variability of the flux density is reduced, the change of the flux density is more uniform, the waveform of the flux density of the air gap is close to sine wave, the flux density of the air gap and the counter-potential harmonic ratio are reduced, and further vibration noise is effectively reduced. However, when A/F is more than 0.7, the radian of the eccentric cambered surfaces on the two sides of the magnetic pole is too large, so that the length of an air gap at most positions of the surface of the rotor is increased, the flux guide of the air gap at most positions of the surface of the rotor is reduced, the flux density of the air gap at most positions of the surface of the rotor is reduced, the waveform of the flux density of the air gap is not improved, the waveform distortion rate is still higher, the vibration noise of the motor is still larger, meanwhile, the length of the air gap is too large, the magnetic leakage is increased, the flux linkage of the motor is reduced, the torque of the motor is reduced, and the efficiency of the motor is reduced. Thus, preferably, 0.7. Gtoreq.A/F. Gtoreq.0.25.
As shown in fig. 4 and 8, the pole pair number of the motor is P, and the radian of the eccentric cambered surface is A/2; the included angle between the connecting line of the eccentric arbitrary point and the connecting line of the eccentric connecting point is set as theta 3, the connecting line of the eccentric arbitrary point is the connecting line of any point on the eccentric cambered surface and the circle center of the surface mounted motor rotor, the connecting line of the eccentric connecting point is the connecting line of the W connecting point and the circle center of the surface mounted motor rotor, the W connecting point is the connecting point of the middle cambered surface and the eccentric cambered surface, and it can be understood that A/2 is more than theta 3 and more than 0 DEG, and the theta 3 is gradually increased in the process of changing the eccentric cambered surface along the curve until the W point is changed to the edge lines on the two sides of the magnetic steel 2. The distance between any point on the eccentric cambered surface and the circle center of the surface-mounted motor rotor is an eccentric diameter R6, namely, the eccentric diameter R6 gradually becomes smaller in the process of changing along a curve from a W point. The eccentric diameter R6 and the radius R5 of the middle cambered surface meet the following relation:wherein->. Through the arrangement, the length of the air gap between the stator 1 and the rotor corresponding to the trimming position (eccentric cambered surface) of the magnetic steel 2 is increased, so that the variability of the length of the air gap is reduced, the air gap flux guide of a magnetic circuit is changed more uniformly, the sine degree of the air gap flux density waveform on the surface of the rotor is improved, the harmonic duty ratio is reduced, the torque pulsation is further reduced, the vibration noise and the harmonic loss of a motor are reduced, and the efficiency of the motor is improved.
The angle of the gap between two adjacent magnetic steels 2 is C, and the angle occupied by a single magnetic pole of the surface-mounted motor rotor is F. According to the research, when the C/F is more than or equal to 0.15, the installation of the fastener between the magnetic steel 2 and the magnetic steel 2 is facilitated, and the mechanical strength of the whole structure of the rotor is enhanced; however, when the polar arc coefficient is more than or equal to 0.2 and is more than or equal to C/F, the utilization rate of the magnetic steel 2 is reduced, and the output torque of the motor is reduced. Thus, preferably, 0.2. Gtoreq.C/F. Gtoreq.0.15.
It can be understood that, at the position where neither the stator 1 nor the magnetic steel 2 is trimmed, the air gap is minimum, the air gap length is D, and the air gap length gradually increases from the position where the air gap is minimum to move clockwise or counterclockwise along the surface of the magnetic steel 2 of the rotor.
As shown in fig. 5, 6 and 7, the embodiment of the invention also provides a stator, the tooth shoe of the stator is provided with an inner side surface facing the rotor of the surface mount motor, and two sides of the inner side surface are provided with edge cutting structures symmetrically arranged along the central line of the inner side surface.
According to the stator provided by the embodiment of the invention, the edge cutting structures symmetrically arranged along the central line of the inner side surface are arranged on the two sides of the inner side surface, so that the length of an air gap of a motor at each position along the inner circular surface of the stator 1 can be changed, and further, the air gap magnetic field is improved, the magnetic density of the air gap and the sine degree of counter potential waveforms are improved, the harmonic duty ratio is reduced, further, the torque pulsation is reduced, and the vibration noise of the motor is effectively reduced.
It will be appreciated that the trim structure is an edge structure after a portion of the existing solid structure has been cut away.
Preferably, the trimming structure of the inner side surface is a curved tangential surface disposed on both sides of the middle surface of the inner side surface, and the curved tangential surface is curved toward the radial outer side of the stator 1. In this embodiment, the inner surface of the stator 1 tooth shoe is cut off, and the structure of the rotor may be the same as that of the rotor in the related art.
Of course, the trimming structure of the inner side surface may be configured as other structures, such as a plane.
Wherein, the radian of the curve section is G/2, and the angle occupied by a single tooth shoe of the stator 1 is H. As shown in fig. 5, the connection point between the intermediate surface and the curved tangential surface is a T point, and the cutting position (curved tangential surface) of the tooth shoe of the stator 1 is near the air gap between the stator and the rotor. Simulation researches show that the ratio of the radian occupied by a curve section (the cutting position of the stator 1 tooth shoe) to the angle occupied by a single tooth shoe is H, and the influence on the air gap flux density harmonic wave is larger. When G/H is more than or equal to 0.4, the radian of the curve section is larger, so that the air gap length transition of the inner surface of the motor stator 1 is more uniform, the uniformity of the air gap flux guide of a magnetic circuit is improved, the air gap flux density and counter potential waveforms are improved, the harmonic wave duty ratio is reduced, and the vibration noise of the motor is reduced. However, when G/H is more than 0.7, the radian angle of the curve tangential plane is too large, and the magnetic flux is excessively concentrated at the center line of the tooth shoe of the stator 1, so that the air gap density is too high, the waveform distortion of the air gap density is serious, the harmonic wave duty ratio is increased, and the vibration noise of the motor is increased. Thus, preferably, 0.7.gtoreq.G/H.gtoreq.0.4.
Preferably, the number of grooves on the stator 1 is Q, the radian of a curve section is G/2, an included angle between a connecting line of any point of the curve and a connecting line of a curve connecting point is theta 2, and the connecting line of any point of the curve is a connecting line between any point of the curve section and the center of a circle of the stator (1); the connecting line of the curve connecting point is the connecting line of the T connecting point and the center of the stator 1, and the T connecting point is the connecting point of the middle surface and the curve tangential surface. That is, G/2 > θ2 > 0, wherein the stator 1 is concentric with the rotor, θ2 becomes gradually larger during the process of changing the edge of the stator 1 along the curve, and the curve tangent plane changes along the curve from the point T until coinciding with the edge line of the tooth shoe of the stator 1. The distance between any point on the curve tangent plane and the center of the circle of the stator 1 is the trimming diameter R4 of the stator 1. That is, the stator 1 trimmed diameter R4 gradually becomes larger in the course of changing along the curve from the T point, and the stator 1 trimmed diameter R4 and the inner radius (i.e., radius of the intermediate surface) R3 of the stator 1 satisfy the following relationship:wherein->. The change of the air gap flux guide of the motor is more uniform, the sine degree of the air gap flux density waveform is improved, the harmonic duty ratio and the torque pulsation are reduced, the vibration noise and the harmonic loss of the motor are also reduced, and the motor efficiency is improved.
Wherein Q is more than or equal to 4. In this embodiment, q=12.
It can be understood that, at the position where neither the stator 1 nor the magnetic steel 2 is trimmed, the air gap is minimum, the air gap length is D, and the air gap length gradually increases from the position where the air gap is minimum to move clockwise or counterclockwise along the surface of the magnetic steel 2 of the rotor.
The embodiment of the invention also provides a surface-mounted motor, which comprises a surface-mounted motor rotor and a stator 1. Wherein, the surface-mounted motor rotor is any one of the surface-mounted motor rotors; alternatively, the stator 1 may be any of the above-described stators. The surface-mounted motor provided by the embodiment of the invention has the same technical effects as the rotor and the stator of the surface-mounted motor, and is not described in detail herein.
In the present specification, each embodiment is described in a progressive manner, and each embodiment is mainly described in a different point from other embodiments, and identical and similar parts between the embodiments are all enough to refer to each other.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (7)
1. The surface-mounted motor rotor is characterized in that magnetic steel (2) of the surface-mounted motor rotor is provided with an outer side face facing a stator (1), and two sides of the outer side face are provided with edge cutting structures symmetrically arranged along the center line of the edge cutting structures;
the trimming structure of the outer side surface is an eccentric cambered surface arranged on two sides of the middle cambered surface of the outer side surface, and the eccentric cambered surface is bent towards the inner side of the surface-mounted motor rotor;
the eccentric cambered surface and the middle cambered surface are in smooth transition;
the number of the magnetic pole pairs of the motor is P, and the radian of the eccentric cambered surface is A/2; the included angle between the eccentric arbitrary point connecting line and the eccentric connecting point connecting line is set as theta 3, the eccentric arbitrary point connecting line is a connecting line of an arbitrary point on the eccentric cambered surface and the circle center of the surface mounted motor rotor, the eccentric connecting point connecting line is a connecting line of a W connecting point and the circle center of the surface mounted motor rotor, and the W connecting point is a connecting point of the middle cambered surface and the eccentric cambered surface;the distance between any point on the eccentric cambered surface and the circle center of the surface-mounted motor rotor is an eccentric diameter R6; the eccentric diameter R6 and the radius R5 of the middle cambered surface meet the following relation:wherein->
2. A surface-mounted motor rotor according to claim 1, characterized in that the arc of the eccentric arc surface is greater the closer to the magnetic pole boundary of the magnetic steel (2).
3. The surface mount motor rotor of claim 1, wherein the radian of the eccentric cambered surface is a/2, and the single magnetic pole of the surface mount motor rotor occupies an angle of F;
0.7≥A/F≥0.25。
4. a surface-mounted motor rotor according to any one of claims 1-3, characterized in that the angle of the gap between two adjacent magnetic steels (2) is C, and the angle occupied by a single magnetic pole of the surface-mounted motor rotor is F;0.2 The ratio of C/F is more than or equal to 0.15.
5. The stator is characterized in that the tooth shoes of the stator are provided with inner side faces facing to a surface-mounted motor rotor, and the two sides of the inner side faces are provided with trimming structures symmetrically arranged along the central line of the trimming structures;
the trimming structure of the inner side surface is a curve tangent plane arranged on two sides of the middle surface of the inner side surface, and the curve tangent plane is bent towards the radial outer side of the stator (1);
the number of grooves on the stator (1) is Q; the radian of the curve section is G/2; the included angle between the curve arbitrary point connecting line and the curve connecting point connecting line is set as theta 2, and the curve arbitrary point connecting line is a connecting line between any point on the curve tangent plane and the circle center of the stator (1); by a means ofThe curve connecting point connecting line is a connecting line of a T connecting point and the center of the stator (1), and the T connecting point is a connecting point of the middle surface and the curve tangential surface; the distance between any point on the curve tangent plane and the center of the circle of the stator (1) is the trimming diameter R4 of the stator (1); the trimming diameter R4 of the stator (1) and the inner radius R3 of the stator (1) meet the following relationship:wherein->
6. A stator according to claim 5, characterized in that the arc of the curved section is G/2, the angle occupied by the single tooth shoe of the stator (1) being H;
0.7≥G/H≥0.4。
7. a surface-mounted motor comprising a surface-mounted motor rotor and a stator (1), the surface-mounted motor rotor being as claimed in any one of claims 1 to 4;
or, the stator (1) is a stator according to any one of claims 5-6.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710676131.5A CN107276272B (en) | 2017-08-09 | 2017-08-09 | Surface-mounted motor, surface-mounted motor rotor and stator |
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| CN201710676131.5A CN107276272B (en) | 2017-08-09 | 2017-08-09 | Surface-mounted motor, surface-mounted motor rotor and stator |
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| CN107276272A CN107276272A (en) | 2017-10-20 |
| CN107276272B true CN107276272B (en) | 2023-09-26 |
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| CN108199554B (en) * | 2018-02-28 | 2020-07-07 | 山东大学 | Bipolar multiphase permanent magnet synchronous motor and method |
| JP7080703B2 (en) | 2018-04-12 | 2022-06-06 | 株式会社ミツバ | Motors and brushless wiper motors |
| CN108736607A (en) * | 2018-05-10 | 2018-11-02 | 天津大学 | A kind of magnetic field modulation wave-activated generator with permanent magnet eccentric structure |
| CN110445275A (en) * | 2019-09-07 | 2019-11-12 | 浙江新能机电科技有限公司 | A kind of rotor structure and rotor assembly of durface mounted permanent magnet synchronous motor |
| CN110718974B (en) * | 2019-10-22 | 2021-03-26 | 珠海格力节能环保制冷技术研究中心有限公司 | Motor stator, pole shoe machining method thereof and permanent magnet motor |
| CN111725923B (en) * | 2020-07-27 | 2021-07-02 | 威灵（芜湖）电机制造有限公司 | Motor and household appliance |
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- 2017-08-09 CN CN201710676131.5A patent/CN107276272B/en active Active
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| JP2008099418A (en) * | 2006-10-11 | 2008-04-24 | Matsushita Electric Ind Co Ltd | Permanent magnet embedded type motor |
| CN102005882A (en) * | 2009-09-01 | 2011-04-06 | 罗伯特.博世有限公司 | Electrical machine with reduced positioning torque, particularly permanent magnet synchronous machine |
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| CN107276272A (en) | 2017-10-20 |
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