CN110350746B - Permanent magnet motor - Google Patents
Permanent magnet motor Download PDFInfo
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- CN110350746B CN110350746B CN201910713933.8A CN201910713933A CN110350746B CN 110350746 B CN110350746 B CN 110350746B CN 201910713933 A CN201910713933 A CN 201910713933A CN 110350746 B CN110350746 B CN 110350746B
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- permanent magnet
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- stator tooth
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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
- 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]
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K21/00—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets
- H02K21/12—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets with stationary armatures and rotating magnets
- H02K21/14—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets with stationary armatures and rotating magnets with magnets rotating within the armatures
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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
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Permanent Magnet Type Synchronous Machine (AREA)
- Iron Core Of Rotating Electric Machines (AREA)
- Permanent Field Magnets Of Synchronous Machinery (AREA)
Abstract
The application provides a permanent magnet motor. This permanent-magnet machine includes stator module, and stator module includes stator core (1), and stator core (1) includes stator tooth boots (2), and in the plane of the central axis of perpendicular to stator core (1), the bilateral symmetry of stator tooth boots (2) is provided with two sets of auxiliary grooves, and two sets of auxiliary grooves are located the radial inner periphery side of stator tooth boots (2), and every auxiliary groove of group includes first recess (3) and second recess (4) respectively. According to the permanent magnet motor, the torque capacity of the motor can be effectively improved, the torque fluctuation of the motor is improved, and the harmonic content is greatly weakened.
Description
Technical Field
The application relates to the technical field of motors, in particular to a permanent magnet motor.
Background
The torque ripple is an inherent characteristic of the motor, which increases the torque ripple when the motor operates, thereby causing vibration and operational noise of the motor to increase. The torque fluctuation is caused by two parts, one part is the cogging torque when the motor is in no-load operation, the other part is the fluctuation of the electromagnetic torque caused by magnetic density harmonic waves when the motor is in load operation, and how to weaken the torque fluctuation of the permanent magnet motor is an industrial problem. One effective measure is to start with cogging torque and reduce its amplitude by opening an auxiliary slot in the center of the stator tooth to increase the frequency of cogging torque.
However, it has been found that this type of opening is only effective for a certain type of rotor, and when the rotor structure of the motor is not uniform, the effect is reduced or even countered. On the other hand, although the cogging torque is reduced in this way, since the auxiliary slots are formed in the center of the teeth, the fundamental wave in the air gap flux density is weakened drastically, so that the output torque of the motor is greatly reduced, and the running performance of the motor is reduced. And this measure has no significant attenuation effect on torque ripple due to flux density harmonics.
In the prior art, the cogging torque is weakened by increasing the least common multiple of the number of pole slots through the auxiliary slots, and a certain effect is achieved, but the auxiliary slots can also greatly weaken the fundamental wave of magnetic density to cause torque reduction, and the weakening effect on key harmonics of 3, 5, 7 and the like is poor due to lack of pertinence, so that the torque fluctuation improvement effect of the motor is not obvious.
Disclosure of Invention
Therefore, the technical problem to be solved by the application is to provide a permanent magnet motor, which can effectively improve the torque capacity of the motor, improve the torque fluctuation of the motor and greatly weaken the harmonic content.
In order to solve the problem, the application provides a permanent magnet motor, including stator module, stator module includes stator core, and stator core includes stator tooth boots, and in the plane of the central axis of perpendicular to stator core, the bilateral symmetry of stator tooth boots is provided with two sets of auxiliary grooves, and two sets of auxiliary grooves are located the radial inner peripheral side of stator tooth boots, and every auxiliary groove of group includes first recess and second recess respectively.
Preferably, the center lines of the two first grooves form an included angle as1, and the center lines of the two second grooves form an included angle as2, wherein as1/as2 is 0.5-0.8.
Preferably, the included angle formed by the central lines of the two first grooves is as1, and the included angle between two end points of the circumferential outer edge of the stator tooth shoe and a connecting line of the center of the stator core is as3, wherein as1/as3 is 0.3-0.5.
Preferably, the second groove is located on the circumferential outer side of the first grooves, the radius of the stator tooth shoe between two first grooves is r1, the radius of the stator tooth shoe between the first grooves and the second grooves is r2, and r1/r2 is 0.97-1.
Preferably, the second groove is located on the circumferential outer side of the first groove, the radius of the stator tooth shoe between the first groove and the second groove is r2, the radius of the stator tooth shoe on the circumferential outer side of the second groove is r3, and r2/r3 is 0.95-1.
Preferably, the permanent magnet motor further comprises a rotor assembly, the rotor assembly comprises a rotor core, a mounting groove is formed in the rotor core, a permanent magnet is arranged in the mounting groove, air grooves are formed in two ends of the mounting groove respectively, and an extending groove extending towards the circumferential direction of the magnetic pole center line is formed in one side, close to the magnetic pole center line, of each air groove.
Preferably, an included angle formed by connecting the end points of the radial outer peripheral sides of the two extension grooves close to the center line of the magnetic pole and the center of the rotor core is ar1, and an included angle formed by the center lines of the two second grooves is as2, wherein ar1/as2 is 1.1-1.4.
Preferably, an included angle formed by connecting the end points of the radial outer peripheral sides of the two extension grooves close to the center line of the magnetic pole and the center of the rotor core is ar1, an included angle formed by connecting the two end points of the radial outer peripheral sides of the permanent magnets and the center of the rotor core is ar2, wherein ar1/ar2 is 0.7-1.
Preferably, the circumferential width of the first groove is w1, the circumferential width of the second groove is w2, and w1/w2 is 0.9-1.1.
Preferably, the circumferential width of the first groove is w1, the circumferential width of the permanent magnet is wm, wherein w1/wm is 0.01-0.03.
Preferably, the stator core comprises 9 stator teeth, the rotor core comprises 6 groups of mounting slots, and the permanent magnet motor is a 9-slot 6-pole motor.
The application provides a permanent magnet motor, including stator module, stator module includes stator core, and stator core includes stator tooth boots, and in the plane of the central axis of perpendicular to stator core, the bilateral symmetry of stator tooth boots is provided with two sets of auxiliary grooves, and two sets of auxiliary grooves are located the radial inner peripheral side of stator tooth boots, and every auxiliary groove of group includes first recess and second recess respectively. The utility model provides a permanent magnet motor sets up each 2 auxiliary grooves in stator tooth's bilateral symmetry, does not influence the fundamental wave amplitude, improves the frequency of tooth's socket torque pulsation, reduces its amplitude, weakens the tooth's socket torque of motor under the prerequisite of guaranteeing motor electromagnetic torque, and simultaneously, the quantity in auxiliary groove is 2, can weaken magnetic density harmonic such as3, 5, 7 better, cooperation tooth both sides set up great air gap, further reduce the torque ripple.
Drawings
Fig. 1 is a schematic structural diagram of a permanent magnet motor according to an embodiment of the present application;
fig. 2 is a first dimensional block diagram of a permanent magnet motor according to an embodiment of the present application;
fig. 3 is a second dimensional block diagram of a permanent magnet machine according to an embodiment of the present application;
FIG. 4 is an exploded view of the rotor field harmonics;
FIG. 5a is a graph illustrating the interaction of an auxiliary slot with harmonics in the prior art;
FIG. 5b is a graph of the interaction of the auxiliary slots and harmonics of a permanent magnet machine according to an embodiment of the present application;
fig. 6a is a first magnetic circuit structure diagram of an auxiliary slot of a permanent magnet motor according to an embodiment of the present application;
fig. 6b is a second magnetic circuit structure diagram of an auxiliary slot of a permanent magnet motor according to an embodiment of the present application;
FIG. 7 is a graph of the effect of ar1/as2 on harmonic content for a permanent magnet machine according to an embodiment of the present application;
FIG. 8 is a graph of the effect of as1/as2 on harmonic content for a permanent magnet machine according to an embodiment of the present application;
fig. 9 is a graph comparing cogging torque curves for a permanent magnet machine of an embodiment of the present application with a prior art permanent magnet machine;
fig. 10 is a graph comparing electromagnetic torque curves of a permanent magnet motor according to an embodiment of the present application with a permanent magnet motor according to the prior art.
The reference numerals are represented as:
1. a stator core; 2. a stator tooth shoe; 3. a first groove; 4. a second groove; 5. a rotor core; 6. mounting grooves; 7. a permanent magnet; 8. an air tank; 9. an extension groove.
Detailed Description
With combined reference to fig. 1 to 10, according to an embodiment of the present application, a permanent magnet motor includes a stator assembly, the stator assembly includes a stator core 1, the stator core 1 includes a stator tooth shoe 2, two sets of auxiliary slots are symmetrically disposed on two sides of the stator tooth shoe 2 in a plane perpendicular to a central axis of the stator core 1, the two sets of auxiliary slots are located on a radial inner peripheral side of the stator tooth shoe 2, and each set of auxiliary slots includes a first slot 3 and a second slot 4.
The utility model provides a permanent magnet motor sets up each 2 auxiliary grooves in stator tooth's bilateral symmetry, does not influence the fundamental wave amplitude, can improve the frequency of tooth's socket torque pulsation, reduces its amplitude, weakens the tooth's socket torque of motor under the prerequisite of guaranteeing motor electromagnetic torque, and simultaneously, the quantity in auxiliary groove is 2, can weaken magnetic density harmonic such as3, 5, 7 better, cooperation tooth both sides set up great air gap, further reduce the torque ripple.
A plurality of stator tooth parts are uniformly distributed on the stator core 1 along the circumference, the stator tooth parts extend axially at the part close to the outer periphery of the rotor to form a wider tooth shoe part, two sides of the tooth shoe part are symmetrically provided with 2 groups of auxiliary grooves respectively, the tooth shoe part comprises a first groove 3 and a second groove 4, the number of the stator is z, the number of the auxiliary grooves is 4z, the frequency of the cogging torque without the auxiliary grooves is the least common multiple of z and the number of the rotor poles 6, after the auxiliary grooves are arranged, the frequency of the cogging torque is the least common multiple of (4z + z) and the number of the rotor poles 6, the pulsation frequency is obviously improved, and the reduction of the cogging torque amplitude is predicted, as shown in fig. 2 and 3.
In addition, the harmonic decomposition of the rotor magnetic field is shown in fig. 4 and comprises odd-numbered waves such as1 (fundamental wave), 3, 5, 7 and the like, in the prior art, a groove is formed in the middle of a stator tooth, an auxiliary groove can increase an air gap at the position, so that the rotor magnetic field is weakened, although the amplitude of the harmonic can be weakened by the mode, the amplitude of the fundamental wave can also be weakened, as shown in fig. 5a, an arrow indicates the weakening effect on the amplitude, and the fundamental wave can be greatly weakened, so that the electromagnetic torque is greatly reduced. In the present application, the first and second grooves 3 and 4 are disposed on both sides of the tooth portion, and the middle portion of the tooth is not changed, so that the amplitude of the fundamental wave is less affected, as shown by the arrow in fig. 5b, and the amplitude of the harmonic wave is greatly weakened by the auxiliary groove. On the other hand, the number of auxiliary slots in this application is 2, which can further attenuate the 5 th and 7 th magnetic harmonics (3 rd harmonic in fig. 5b, 5 th and 7 th order not shown).
After the scheme of the application is adopted, compared with the prior art that the auxiliary groove is formed in the tooth part, the electromagnetic torque of the permanent magnet motor is improved by 8%, the cogging torque is reduced by 50%, the torque fluctuation is reduced by 50%, and the motor performance is greatly improved.
The included angle formed by the center lines of the two first grooves 3 is as1, and the included angle formed by the center lines of the two second grooves 4 is as2, wherein as1/as2 is 0.5-0.8. The as1 represents the circumferential position of the first groove 3 and influences the suppression effect of the auxiliary groove on the 3 th harmonic and the 5 th harmonic, the as2 represents the circumferential position of the second groove 4 and influences the suppression effect of the auxiliary groove on the 5 th harmonic and the 7 th harmonic, and research shows that when the as1/as2 is 0.5-0.8, the key harmonics such as the 5 th harmonic and the 7 th harmonic can be well suppressed, and the attenuation effect on the cogging torque is good, as shown in fig. 8.
The included angle formed by the central lines of the two first grooves 3 is as1, and the included angle between two end points of the circumferential outer edge of the stator tooth shoe 2 and a connecting line of the centers of the stator cores 1 is as3, wherein as1/as3 is 0.3-0.5. The as3 represents the circumferential width of the stator tooth shoe 1, and influences the number of magnetic lines of force capable of entering a stator tooth part and the width of magnetic dense waves under the tooth, and researches show that when the as1/as3 is 0.3-0.5, the amplitude of a fundamental wave can be guaranteed to be weakened to be small, and meanwhile, 3-order and 5-order harmonics can be greatly weakened by the first groove 3.
The second grooves 4 are located on the circumferential outer side of the first grooves 3, the radius of the stator tooth shoe 2 between two first grooves 3 is r1, the radius of the stator tooth shoe 2 between the first grooves 3 and the second grooves 4 is r2, wherein r1/r2 is 0.97-1.
The second groove 4 is located at the circumferential outer side of the first groove 3, the radius of the stator tooth shoe 2 between the first groove 3 and the second groove 4 is r2, the radius of the stator tooth shoe 2 at the circumferential outer side of the second groove 4 is r3, wherein r2/r3 is 0.95-1.
The smaller r1, r2 and r3 are, the smaller the air gap is, the smaller the magnetic resistance is, the larger the rotor magnetic field fundamental wave and harmonic amplitude is, the larger the electromagnetic torque is, and the larger the torque fluctuation caused by the harmonic wave is, the smaller the air gap in the middle of the tooth is, the larger the air gaps on both sides are, and the higher harmonic wave is further weakened on the basis of the first groove 3 and the second groove 4 because r1/r2 is 0.97-1. The radial thickness of the tooth shoe shoulder is thin and is easy to saturate, so that the magnetic saturation phenomenon of the tooth shoe shoulder can be weakened and the distortion of space harmonics, namely the armature reaction and the motor heating, can be reduced by making r2/r3 equal to 0.95-1.
The permanent magnet motor further comprises a rotor assembly, the rotor assembly comprises a rotor core 5, a mounting groove 6 is formed in the rotor core 5, a permanent magnet 7 is arranged in the mounting groove 6, air grooves 8 are respectively formed in two ends of the mounting groove 6, and extending grooves 9 extending in the circumferential direction of the magnetic pole center line are respectively formed in one side, close to the magnetic pole center line, of each air groove 8.
The rotor core is formed by laminating soft magnetic material sheets. The rotor core is provided with a plurality of groups of mounting grooves 6, and permanent magnets 7 are mounted in the mounting grooves 6. The part of the mounting groove 6 near the outer periphery of the rotor extends towards the center line of the magnetic pole to form an extension groove 9. The extension slot 9 adjusts the width of the permanent magnet facing the air gap, the width is large, a larger air gap flux density cannot be formed, and the magnetic lines of force cannot be effectively guided into the stator to exert the effect of the stator tooth auxiliary slot, the width is small, so that more magnetic lines of force are concentrated together to cause magnetic saturation, the iron loss of the rotor is increased, the heat productivity is increased, and the electromagnetic torque is reduced. As shown in fig. 6a and 6b, the rotor in one embodiment adopts a solution of the prior art, in which there is no extension slot 9, so that the magnetic force lines are not modulated by the auxiliary slots of the stator teeth, and the auxiliary slots cannot achieve the effects of reducing the cogging torque and suppressing the harmonic waves, whereas in the present invention, the auxiliary slots of the stator teeth have the best suppression effect on the harmonic waves by reasonably setting the included angle of the two extension slots 9.
An included angle formed by connecting the end points of the radial outer peripheral sides of the two extension grooves 9 close to the center line of the magnetic pole and the center of the rotor core 5 is ar1, an included angle formed by the center lines of the two second grooves 4 is as2, wherein ar1/as2 is 1.1-1.4. The width of the rotor magnetic flux surface is represented by ar1, the width of the magnetic flux surface which can be acted by the auxiliary groove is represented by as2, and research shows that when ar1/as2 is 1.1-1.4, the magnetic flux lines can be modulated by the first groove 3 and the second groove 4 as much as possible, and the suppression effect on harmonic waves is good, as shown in fig. 7.
An included angle formed by connecting the end points of the radial outer peripheral sides of the two extension grooves 9 close to the center line of the magnetic poles and the center of the rotor core 5 is ar1, an included angle formed by connecting the two end points of the radial outer peripheral sides of the permanent magnets 7 and the center of the rotor core 5 is ar2, wherein ar1/ar2 is 0.7-1. The extension slot 9 adjusts the width of the permanent magnet 7 facing the air gap, the width is large, a larger air gap flux density cannot be formed, the width is small, more magnetic lines of force are concentrated together to cause magnetic saturation, the iron loss of the rotor is increased, the heat productivity is increased, and the electromagnetic torque is reduced. Because the permanent magnet 7 is a magnetomotive force source, research shows that the ar1/ar2 is 0.7-1, and magnetic lines of force at the pole shoe are relatively uniform.
The circumferential width of the first groove 3 is w1, the circumferential width of the second groove 4 is w2, and w1/w2 is 0.9-1.1.
The circumferential width of the first groove 3 is w1, the circumferential width of the permanent magnet 7 is wm, and w1/wm is 0.01-0.03.
The positions of the first groove 3 and the second groove 4 are mutually restricted, w1 is large, w2 is bound to be reduced, and vice versa, and researches show that the harmonic suppression effect is best when the ratio of w1/w2 is 0.9-1.1. The larger w1 and w2, the better the harmonic attenuation effect is, the more the electromagnetic torque is reduced, and the lower the utilization rate of the permanent magnet is. In addition, when the width ratio of the first groove 3 to the permanent magnet 7 satisfies w 1/wm-0.01-0.03, the space magnetic density harmonic can be reduced to the maximum extent on the premise of ensuring the utilization rate of the permanent magnet (i.e. ensuring the amplitude of the fundamental wave).
Research shows that the structure of the stator assembly and the rotor assembly has a particularly outstanding effect when applied to a 9-slot 6-pole motor.
The permanent magnet motor adopting the scheme of the application has the advantages that the cogging torque is compared with that in the prior art, as shown in fig. 9, obviously, in the technical scheme of the application, the ripple frequency of the cogging torque is higher, and the amplitude is smaller.
The torque curve of the permanent magnet motor adopting the scheme of the application is compared with that of the prior art, as shown in fig. 10, the technical scheme of the application has larger average torque and smaller torque fluctuation.
It is readily understood by a person skilled in the art that the advantageous ways described above can be freely combined, superimposed without conflict.
The present invention is not intended to be limited to the particular embodiments shown and described, but is to be accorded the widest scope consistent with the principles and novel features herein disclosed. The foregoing is only a preferred embodiment of the present application, and it should be noted that, for those skilled in the art, several modifications and variations can be made without departing from the technical principle of the present application, and these modifications and variations should also be considered as the protection scope of the present application.
Claims (10)
1. The permanent magnet motor is characterized by comprising a stator assembly, wherein the stator assembly comprises a stator core (1), the stator core (1) comprises a stator tooth shoe (2), two groups of auxiliary grooves are symmetrically arranged on two sides of the stator tooth shoe (2) in a plane perpendicular to the central axis of the stator core (1), the two groups of auxiliary grooves are positioned on the radial inner peripheral side of the stator tooth shoe (2), and each group of auxiliary grooves respectively comprises a first groove (3) and a second groove (4); the included angle formed by the central lines of the two first grooves (3) is as1, the included angle between two end points of the circumferential outer edge of the stator tooth shoe (2) and a connecting line of the centers of the stator cores (1) is as3, wherein as1/as3 is 0.3-0.5; the permanent magnet motor also comprises a rotor assembly, the rotor assembly comprises a rotor core (5), a mounting groove (6) is formed in the rotor core (5), a permanent magnet (7) is arranged in the mounting groove (6), air grooves (8) are respectively formed in two ends of the mounting groove (6), and extension grooves (9) extending towards the circumferential direction of the magnetic pole center line are respectively formed in one side, close to the magnetic pole center line, of each air groove (8); the included angle formed by the connecting lines of the end points of the radial outer peripheral sides of the two extension grooves (9) close to the center line of the magnetic pole and the center of the rotor core (5) is ar1, the included angle formed by the center lines of the two second grooves (4) is as2, and ar1/as2 is 1.1-1.4.
2. The permanent magnet motor according to claim 1, wherein as1/as2 is 0.5-0.8.
3. The permanent magnet electrical machine according to claim 1, wherein the second grooves (4) are located circumferentially outside the first grooves (3), the stator tooth shoes (2) between two first grooves (3) having a radius r1, the stator tooth shoes (2) between the first grooves (3) and the second grooves (4) having a radius r2, wherein r1/r2 is 0.97-1.
4. The permanent magnet electrical machine according to claim 1, wherein the second groove (4) is located circumferentially outside the first groove (3), the stator tooth shoe (2) between the first groove (3) and the second groove (4) has a radius r2, the stator tooth shoe (2) circumferentially outside the second groove (4) has a radius r3, wherein r2/r3 is 0.95-1.
5. A permanent magnet machine according to claim 3, characterized in that the radius of the stator tooth shoes (2) on the circumferential outer side of the second groove (4) is r3, where r2/r3 is 0.95-1.
6. The permanent magnet motor according to claim 1, wherein an included angle formed by a connecting line of two end points of the radial outer peripheral side of the permanent magnet (7) and the center of the rotor core (5) is ar2, wherein ar1/ar2 is 0.7-1.
7. The permanent magnet electrical machine according to claim 1, wherein the circumferential width of the first groove (3) is w1 and the circumferential width of the second groove (4) is w2, wherein w1/w2 is 0.9-1.1.
8. The permanent magnet electrical machine according to claim 1, wherein the circumferential width of the first groove (3) is w1, and the circumferential width of the permanent magnet (7) is wm, wherein w1/wm is 0.01-0.03.
9. The permanent magnet electrical machine according to claim 7, wherein the permanent magnets (7) have a circumferential width wm, wherein w1/wm is 0.01-0.03.
10. A permanent magnet machine according to claim 1, characterized in that the stator core (1) comprises 9 stator teeth, the rotor core (5) comprises 6 sets of mounting slots (6), and the permanent magnet machine is a 9 slot 6 pole machine.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910713933.8A CN110350746B (en) | 2019-08-02 | 2019-08-02 | Permanent magnet motor |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910713933.8A CN110350746B (en) | 2019-08-02 | 2019-08-02 | Permanent magnet motor |
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| CN110350746A CN110350746A (en) | 2019-10-18 |
| CN110350746B true CN110350746B (en) | 2020-09-29 |
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Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US11496015B2 (en) * | 2019-06-03 | 2022-11-08 | GM Global Technology Operations LLC | Electric machine with stator tooth tip profile for reducing winding-based power losses |
| CN111293799B (en) * | 2020-02-27 | 2022-10-28 | 南京奥特佳新能源科技有限公司 | Permanent magnet motor with optimized back electromotive force sine waveform and stator thereof |
| CN112165192B (en) * | 2020-09-30 | 2021-07-30 | 安徽美芝精密制造有限公司 | Motor structure and compressor |
| CN112583148A (en) * | 2020-12-22 | 2021-03-30 | 哈尔滨理工大学 | Weaken stator structure of in-wheel motor tooth's socket torque |
| CN113595276B (en) * | 2021-07-28 | 2022-08-02 | 华中科技大学 | Permanent magnet motor tooth socket torque reduction method and device |
| FR3128073A1 (en) | 2021-10-12 | 2023-04-14 | Nidec Psa Emotors | Stator of rotating electric machine |
| CN114123559B (en) * | 2021-11-11 | 2023-04-07 | 珠海格力电器股份有限公司 | Stator assembly and motor |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH1042531A (en) * | 1996-05-24 | 1998-02-13 | Matsushita Electric Ind Co Ltd | Motor |
| US7230359B2 (en) * | 2002-03-22 | 2007-06-12 | Ebm-Papst St. Georgen Gmbh & Co. Kg | Electric motor with poles shaped to minimize cogging torque |
| JP4713348B2 (en) * | 2006-01-13 | 2011-06-29 | 日本電産サンキョー株式会社 | Permanent magnet synchronous motor |
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