CN204886616U - Integrated configuration of stator and rotor - Google Patents
Integrated configuration of stator and rotor Download PDFInfo
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- CN204886616U CN204886616U CN201520517237.7U CN201520517237U CN204886616U CN 204886616 U CN204886616 U CN 204886616U CN 201520517237 U CN201520517237 U CN 201520517237U CN 204886616 U CN204886616 U CN 204886616U
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- rotor
- magnet steel
- axle
- stator
- tooth
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Abstract
The utility model discloses an integrated configuration of stator and rotor belongs to the motor field. Integrated configuration of stator and rotor, including stator and rotor, the stator includes stator core, and stator core is last to be equipped with the wire winding tooth relative with the rotor, and winds tooth evenly distributed on stator core, and the winding has armature winding on the wire winding tooth, the rotor includes rotor core and polylith magnet steel, the interval is provided with a plurality of mounting grooves uniformly making progress in rotor core's week, inlay respectively in every mounting groove and be equipped with a magnet steel, the polylith magnet steel includes the first magnet steel and the second magnet steel of adjacent setting, the symmetry axis at the center of rotor of passing of first magnet steel is the D axle, the symmetry axis at the center of rotor of passing between first magnet steel and the second magnet steel is the Q axle, point on the outline line of rotor terminal surface is g to distance between the adjacent wire winding flank wall, at the fan -shaped within range of Q axle to the D axle, the direction of g along the Q axle to the D axle diminishes.
Description
Technical field
The utility model relates to electric motors, particularly a kind of combining structure of stators and rotators.
Background technology
Permanent magnet motor mainly comprises the rotor with the magnetic steel magnetic pole portion be made up of magnet steel and the stator be made up of iron core and armature winding.
Permanent magnet motor is divided into fractional slot winding and integer groove winding two kinds of structures according to the winding method of armature winding.The permanent magnet motor with fractional slot winding greatly reduces the groove area shared by insulating support, thus can improve armature winding actual copper factor, reduce winding resistance and improve the efficiency of motor.
But adopt the permanent magnet motor of fractional slot winding, armature reaction contains a large amount of high order harmonic components, can cause the increase of motor iron loss; And the permanent magnet motor of fractional slot winding structure, because the asymmetry of magnetic circuit, easily cause the magnetic saturation of local, cause the increase of motor oscillating and noise.
Utility model content
In order to solve the problem of prior art, the utility model embodiment provides a kind of combining structure of stators and rotators.Described technical scheme is as follows:
The utility model embodiment provides a kind of combining structure of stators and rotators, comprise stators and rotators, described stator comprises stator core, described stator core is provided with the coiling tooth relative with described rotor, and described coiling tooth is evenly distributed on described stator core, described coiling tooth is wound with armature winding, described rotor comprises rotor core and polylith magnet steel, the circumference of described rotor core is provided with multiple mounting groove evenly and at intervals, one block of described magnet steel is embedded with respectively in each described mounting groove, described polylith magnet steel comprises the first magnet steel and the second magnet steel that are disposed adjacent, the symmetry axis at the center through described rotor of described first magnet steel is D axle, the symmetry axis at the center through described rotor between described first magnet steel and the second magnet steel is Q axle, point on the outer contour of described rotor end-face is g to the spacing of adjacent described coiling flank wall, in the fan-shaped range of described Q axle to described D axle, the direction of described g along described Q axle to described D axle diminishes.
In a kind of implementation of the utility model embodiment, distance between the outer contour of described rotor end-face and the intersection point of described Q axle to adjacent described coiling flank wall is g2, distance between the outer contour of described rotor end-face and the intersection point of described D axle to adjacent described coiling flank wall is g1,1.5≤g2/g1≤3.5.
In the another kind of implementation of the utility model embodiment, the outer contour of described rotor end-face is made up of the arc section of alternate setting and the V-type section of indent, and described arc section and the smooth connection of V-type section, described D beam warp crosses the center of described arc section, and described Q beam warp crosses the center of described V-type section.
In the another kind of implementation of the utility model embodiment, the radius of described arc section is R1, and the center of described rotor is R2 to the distance of described arc section and described D axle intersection point, and described R1 is less than described R2, and described R1 is greater than 0;
The angle of described arc section is θ 1, and the number of pole-pairs of described rotor is P, 0.444≤θ 1/ (360 °/P)≤0.665, and described P is positive integer.
In the another kind of implementation of the utility model embodiment, described coiling tooth comprises winding section and is connected to the front tooth part on end, described winding section, the outboard wheel profile of described front tooth part end face by arc before tooth and before being connected to described tooth arc two ends tooth before straightway form, distance between described outboard wheel profile two-end-point is c, before described tooth, the length of straightway is a, the width of described winding section is b, (c-b)/2≤a≤c/2, and described a, b, c are all greater than 0.
In the another kind of implementation of the utility model embodiment, a stator slot is pressed from both sides between adjacent two described coiling teeth, the base of described stator slot is made up of stator slot arc and the stator slot straightway that is connected to described stator slot arc two ends, and described stator slot straightway and described stator slot straightway and described sideline vertical with the sideline of described winding section are connected smoothly.
In the another kind of implementation of the utility model embodiment, described rotor core comprises the rotor punching that multi-disc overlaps together, and described stator core comprises the stator punching that multi-disc overlaps together.
In the another kind of implementation of the utility model embodiment, the length of described mounting groove is greater than the length of described magnet steel, the center of described mounting groove is located at by described magnet steel, the both sides of described mounting groove be non-magnetic region form every magnetic bridge, the described width M every magnetic bridge be the 1.5-3 of described rotor punching thickness doubly.
In the another kind of implementation of the utility model embodiment, the quantity of described coiling tooth is 3:2 with the ratio of described rotor number of poles.
In the another kind of implementation of the utility model embodiment, described magnet steel is fastened in described mounting groove by fastener.
The beneficial effect that the technical scheme that the utility model embodiment provides is brought is:
In the stators and rotators combining structure that the utility model embodiment provides, stator comprises stator core, stator core is provided with the coiling tooth relative with described rotor, rotor comprises rotor core and polylith magnet steel, polylith magnet steel comprises the first adjacent magnet steel and the second magnet steel, the symmetry axis at the center through rotor of the first magnet steel is D axle, the symmetry axis at the center through rotor between the first magnet steel and the second magnet steel is Q axle, point on the outer contour of rotor end-face is g to the spacing of adjacent coiling flank wall, in the fan-shaped range of Q axle to D axle, the direction of g along Q axle to D axle diminishes.Point on the outer contour of rotor end-face is to the spacing of adjacent coiling flank wall, direction along Q axle to D axle diminishes, torque pulsation when can effectively reduce the cogging torque of motor and run, effectively suppress the sharply change by stator crown magnetic flux and degree of saturation simultaneously, reduce the amplitude of radial electromagnetic force, thus effectively inhibit the generation of motor oscillating and noise.In addition, the point on the outer contour of rotor end-face is to the spacing of adjacent coiling flank wall, and the direction along Q axle to D axle diminishes, and the back electromotive force that motor is produced is sinusoidal waveform, thus reduces the harmonic current of motor, and then reduces the iron loss of motor.
Accompanying drawing explanation
In order to be illustrated more clearly in the technical scheme in the utility model embodiment, below the accompanying drawing used required in describing embodiment is briefly described, apparently, accompanying drawing in the following describes is only embodiments more of the present utility model, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
Fig. 1 is the structural representation of the combining structure of a kind of stators and rotators that the utility model embodiment provides;
Fig. 2 is the partial schematic diagram of the combining structure of the stators and rotators that Fig. 1 provides;
Fig. 3 is the combining structure of stators and rotators in the utility model embodiment when being used in motor, and its cogging torque changes schematic diagram with mechanical angle;
Fig. 4 is the combining structure of the stators and rotators of the utility model embodiment when being used in motor, the radial electromagnetic force distribution schematic diagram that different times harmonic is corresponding;
Fig. 5 is the combining structure of the stators and rotators of the utility model embodiment when being used in motor, and its back electromotive force changes schematic diagram with mechanical angle;
Fig. 6 is the partial schematic diagram of the combining structure of the stators and rotators that Fig. 1 provides;
Fig. 7 is the structural representation of the combining structure rotor of the stators and rotators that Fig. 1 provides;
In above-mentioned accompanying drawing, the label of each parts is as follows:
Stator 3, rotor 5, stator core 31, coiling tooth 32, armature winding 33, rotor core 51, magnet steel 52, mounting groove 53, first magnet steel 521, second magnet steel 522, outer contour 50, winding section 321, front tooth part 322, stator slot 34, arc section 54, V-type section 55, sideline 3211, base 341, every magnetic bridge 56, fastener 57, rotating shaft 58.
Embodiment
For making the purpose of this utility model, technical scheme and advantage clearly, below in conjunction with accompanying drawing, the utility model execution mode is described in further detail.
Fig. 1 is the structural representation of the combining structure of a kind of stators and rotators that the utility model embodiment provides, and see Fig. 1, this permanent magnet motor comprises stator 3 and rotor 5.
Wherein, stator 3 comprises stator core 31, and stator core 31 is provided with the coiling tooth 32 relative with rotor 5, and coiling tooth 32 is evenly distributed on stator core 31, coiling tooth 32 is wound with armature winding 33.
Rotor 5 comprises rotor core 51 and polylith magnet steel 52, and the circumference of rotor core 51 is provided with multiple mounting groove 53 evenly and at intervals, is embedded with one block of magnet steel 52 in each mounting groove 53 respectively.
See Fig. 2, polylith magnet steel 52 comprises the first adjacent magnet steel 521 and the second magnet steel 522, the symmetry axis at the center through rotor 5 of the first magnet steel 521 is D axle, the symmetry axis at the center through rotor 5 between the first magnet steel 521 and the second magnet steel 522 is Q axle, point on the outer contour 50 of rotor 5 end face is g to the spacing of adjacent coiling tooth 32 sidewall, in the fan-shaped range of Q axle to D axle, the direction of g along Q axle to D axle diminishes.Wherein, polylith magnet steel 52 is same magnet steel, and the first magnet steel 521 and the second magnet steel 522 can be two pieces of arbitrary neighborhood in polylith magnet steel 52.
Particularly, the point on the outer contour 50 of rotor 5 end face can be point on the outer contour 50 of rotor 5 end face and the minimum range between adjacent coiling tooth 32 to the distance between adjacent coiling tooth 32 sidewall.
In the stators and rotators combining structure that the utility model embodiment provides, stator comprises stator core, stator core is provided with the coiling tooth relative with described rotor, rotor comprises rotor core and polylith magnet steel, polylith magnet steel comprises the first adjacent magnet steel and the second magnet steel, the symmetry axis at the center through rotor of the first magnet steel is D axle, the symmetry axis at the center through rotor between the first magnet steel and the second magnet steel is Q axle, point on the outer contour of rotor end-face is g to the spacing of adjacent coiling flank wall, in the fan-shaped range of Q axle to D axle, the direction of g along Q axle to D axle diminishes.Point on the outer contour of rotor end-face is to the spacing of adjacent coiling flank wall, direction along Q axle to D axle diminishes, torque pulsation when can effectively reduce the cogging torque of motor and run, effectively suppress the sharply change by stator crown magnetic flux and degree of saturation simultaneously, reduce the amplitude of radial electromagnetic force, thus effectively inhibit the generation of motor oscillating and noise.In addition, the point on the outer contour of rotor end-face is to the spacing of adjacent coiling flank wall, and the direction along Q axle to D axle diminishes, and the back electromotive force that motor is produced is sinusoidal waveform, thus reduces the harmonic current of motor, and then reduces the iron loss of motor.
Fig. 3 is that the combining structure of stators and rotators in the utility model embodiment is when being used in motor, its cogging torque changes schematic diagram with mechanical angle, wherein solid line representative have employed the motor (the utility model motor also namely in figure) of the combining structure of the utility model stators and rotators, and represented by dotted arrows conventional motor (also i.e. figure in benchmark).Visible, the cogging torque that have employed the motor of the combining structure of the utility model stators and rotators is better than conventional motor (better the closer to 0).
Fig. 4 is that the combining structure of the stators and rotators of the utility model embodiment is when being used in motor, the radial electromagnetic force distribution schematic diagram that different times harmonic is corresponding, wherein the representative of shade post have employed the motor of the combining structure of the utility model stators and rotators, and open tubular column represents conventional motor.Visible, the amplitude that have employed the radial electromagnetic force of the motor of the combining structure of the utility model stators and rotators is less than the amplitude of the radial electromagnetic force of conventional motor, thus effectively inhibits the generation of motor oscillating and noise.
Fig. 5 is that the combining structure of the stators and rotators of the utility model embodiment is when being used in motor, its back electromotive force changes schematic diagram with mechanical angle, wherein solid line representative have employed the motor of the combining structure of the utility model stators and rotators, and represented by dotted arrows conventional motor.Visible, have employed the back electromotive force of the motor of the combining structure of the utility model stators and rotators in sinusoidal wave, and conventional motor is square wave.The back electromotive force of sine wave, compared to square wave, except reducing the harmonic current of motor, and then reduces outside the iron loss of motor, and the back electromotive force medium-high frequency harmonic wave of sine wave is less in addition, is convenient to carry out position probing.
Refer again to Fig. 2, distance between the outer contour 50 of rotor 5 end face and the intersection point of Q axle to adjacent coiling tooth 32 sidewall is g2, distance between the outer contour 50 of rotor 5 end face and the intersection point of D axle to adjacent coiling tooth 32 sidewall is g1,1.5≤g2/g1≤3.5, by limiting the ratio between the maximum g2 of distance g and minimum value g1, the excursion of distance g can be limited, thus ensure that this combining structure is suppressing the generation of motor oscillating and noise and reducing role in iron loss process.
In a kind of implementation of the utility model embodiment, the outer contour 50 of rotor 5 end face is made up of the arc section 54 of alternate setting and the V-type section 55 of indent, and arc section 54 and V-type section 55 smooth connection, D beam warp crosses the center of arc section 54, and Q beam warp crosses the center of V-type section 55.In other implementations of the utility model embodiment, the outer contour 50 of rotor 5 end face can also have other forms, such as change the V-type section 55 in above-mentioned implementation into straightway, because coiling tooth 32 sidewall has certain radian, therefore adopt straightway, also meet the variation pattern of aforementioned g.Or, above-mentioned V-type section 55 is changed into the arc section of cardiac prominence in rotor 5, the variation pattern of aforementioned g can be met equally.Because the scheme that can meet the variation pattern of aforementioned g is a lot, do not enumerate here.But it should be noted that, adopt the mode of arc section 54 and V-type section 55 smooth connection, not only can meet the variation pattern of g, effectively can also ensure the change of the amplitude changed, thus ensure that this combining structure is suppressing the generation of motor oscillating and noise and reducing role in iron loss process.
Wherein, the radius of arc section 54 is R1, and the center of rotor 5 is that R2, R1 are less than R2 to arc section 54 and the distance of D axle intersection point, and R1 is greater than 0.
Wherein, the angle of arc section 54 is θ 1, the number of pole-pairs of permanent magnet motor be P, 0.444≤θ 1/ (360 °/P)≤0.665, P be positive integer.
Particularly, each point on the arc section 54 adopting above-mentioned R1 and θ 1 to design and the distance amplitude of variation between adjacent coiling tooth 32 sidewall increase, thus ensure that this combining structure is suppressing the generation of motor oscillating and noise and reducing role in iron loss process.
See Fig. 6, the front tooth part 322 that coiling tooth 32 comprises winding section 321 and is connected on end, winding section 321.
Wherein, the outboard wheel profile of front tooth part 322 end face can be straight line, also can be camber line.
In order to increase the distance amplitude of variation between the point on the outer contour of coiling tooth 32 sidewall (being also the outboard wheel profile of front tooth part 322 end face) and rotor 5, the utility model embodiment provides the outboard wheel profile of following front tooth part 322 end face, specifically see Fig. 6, the outboard wheel profile of front tooth part 322 end face by arc before tooth and before being connected to tooth arc two ends two rooted teeth before straightway form, distance between outboard wheel profile two-end-point is c, before tooth, the length of straightway is a, the width of winding section 321 is b, (c-b)/2≤a≤c/2, and a, b, c is all greater than 0.Above-mentioned a, b, c arrange the length that can ensure arc before tooth further, thus ensure the amplitude of variation of g.
In a kind of implementation of the utility model embodiment, a stator slot 34 is pressed from both sides between adjacent two coiling teeth 32, the base 341 of stator slot 34 is made up of stator slot arc and two stator slot straightways being connected to stator slot arc two ends, and stator slot straightway and stator slot straightway and sideline 3211 vertical with the sideline 3211 of winding section 321 are connected smoothly.Certainly, in other implementations, the base 341 of stator slot 34 can also be only made up of arc or straightway.
In the utility model embodiment, rotor core 51 can comprise the rotor punching that multi-disc overlaps together, and stator core 31 can comprise the stator punching that multi-disc overlaps together.Wherein, punching can be magnetic conduction steel disc.
See Fig. 6 and 7, the length of mounting groove 53 is greater than the length of magnet steel 52, and the center of mounting groove 53 is located at by magnet steel 52, the both sides of mounting groove 53 be non-magnetic region form every magnetic bridge 56, every the width M of magnetic bridge 56 be the 1.5-3 of rotor punching thickness doubly.Above-mentioned design is while guarantee mechanical strength, by arrange width be rotor punching thickness 1.5-3 doubly every magnetic bridge 56, effectively limit magnetic field that magnet steel produces by coiling tooth and the magnetic field short circuit that formed every magnetic bridge 52, improve the utilance of magnet and improve the efficiency of motor.
In a kind of implementation of the utility model embodiment, the quantity of coiling tooth 32 is 3:2 with the ratio of the number of poles of rotor 5, makes stators and rotators combining structure adopt fractional-slot design, effectively can improve the utilance of stator slot.
Certainly, above-mentioned ratio is only as preferred, and the quantity of coiling tooth 32 can also be other numerical value with the ratio of the number of poles of rotor 5.
In the utility model embodiment, the quantity of coiling tooth 32 and number of poles specifically can design according to actual needs, and such as shown in Figure 1, the quantity of coiling tooth 32 is 12, and the number of pole-pairs of rotor 5 is 4, facilitates design and the production of stators and rotators.
Further, magnet steel 52 is fastened in mounting groove 53 by fastener 57, and this fastener 57 can be jump ring.
Further, this rotor also comprises rotating shaft 58, and rotor core 51 is set in rotating shaft 58.
In the utility model embodiment, stators and rotators combining structure, except adopting fractional-slot, additionally uses the design of concentratred winding, reduces the length of winding, reduces resistance, improve the efficiency of motor.In addition, adopt Embedded permanent magnet rotor structure, enough mechanical strengths can be obtained without the need to auxiliary body, the reluctance torque of the saliency generation of rotor can be utilized simultaneously to improve the utilance of material.
The foregoing is only preferred embodiment of the present utility model, not in order to limit the utility model, all within spirit of the present utility model and principle, any amendment done, equivalent replacement, improvement etc., all should be included within protection range of the present utility model.
Claims (10)
1. the combining structure of a stators and rotators, comprise stator (3) and rotor (5), described stator (3) comprises stator core (31), described stator core (31) is provided with the coiling tooth (32) relative with described rotor (5), and described coiling tooth (32) is evenly distributed on described stator core (31), described coiling tooth (32) is wound with armature winding (33);
Described rotor (5) comprises rotor core (51) and polylith magnet steel (52), the circumference of described rotor core (51) is provided with multiple mounting groove (53) evenly and at intervals, one piece of described magnet steel (52) is embedded with respectively in each described mounting groove (53), it is characterized in that
Described polylith magnet steel (52) comprises the first magnet steel (521) and the second magnet steel (522) that are disposed adjacent, the symmetry axis at the center through described rotor (5) of described first magnet steel (521) is D axle, the symmetry axis at the center through described rotor (5) between described first magnet steel (521) and the second magnet steel (522) is Q axle, point on the outer contour (50) of described rotor (5) end face is g to the spacing of adjacent described coiling tooth (32) sidewall, in the fan-shaped range of described Q axle to described D axle, the direction of described g along described Q axle to described D axle diminishes.
2. combining structure according to claim 1, it is characterized in that, distance between the outer contour (50) of described rotor (5) end face and the intersection point of described Q axle to adjacent described coiling tooth (32) sidewall is g2, distance between the outer contour (50) of described rotor (5) end face and the intersection point of described D axle to adjacent described coiling tooth (32) sidewall is g1,1.5≤g2/g1≤3.5.
3. combining structure according to claim 2, it is characterized in that, the outer contour (50) of described rotor (5) end face is made up of the arc section (54) of alternate setting and the V-type section (55) of indent, and described arc section (54) and V-type section (55) smooth connection, described D beam warp crosses the center of described arc section (54), and described Q beam warp crosses the center of described V-type section (55).
4. combining structure according to claim 3, it is characterized in that, the radius of described arc section (54) is R1, the center of described rotor (5) is R2 to described arc section (54) and the distance of described D axle intersection point, described R1 is less than described R2, and described R1 is greater than 0;
The angle of described arc section (54) is θ 1, and the number of pole-pairs of described rotor (5) is P, 0.444≤θ 1/ (360 °/P)≤0.665, and described P is positive integer.
5. combining structure according to claim 1, it is characterized in that, described coiling tooth (32) comprises winding section (321) and is connected to the front tooth part (322) on described winding section (321) end, the outboard wheel profile of described front tooth part (322) end face by arc before tooth and before being connected to described tooth arc two ends two rooted teeth before straightway form, distance between described outboard wheel profile two-end-point is c, before described tooth, the length of straightway is a, the width of described winding section (321) is b, (c-b)/2≤a≤c/2, and described a, b, c is all greater than 0.
6. combining structure according to claim 5, it is characterized in that, a stator slot (34) is pressed from both sides between adjacent two described coiling teeth (32), the base (341) of described stator slot (34) is made up of stator slot arc and two stator slot straightways being connected to described stator slot arc two ends, and described stator slot straightway and described stator slot straightway and described sideline (3211) vertical with the sideline (3211) of described winding section (321) are connected smoothly.
7. the combining structure according to any one of claim 1-6, is characterized in that, described rotor core (51) comprises the rotor punching that multi-disc overlaps together, and described stator core (31) comprises the stator punching that multi-disc overlaps together.
8. combining structure according to claim 7, it is characterized in that, the length of described mounting groove (53) is greater than the length of described magnet steel (52), the center of described mounting groove (53) is located at by described magnet steel (52), the both sides of described mounting groove (53) be non-magnetic region form every magnetic bridge (56), the described width M every magnetic bridge (56) be the 1.5-3 of described rotor punching thickness doubly.
9. the combining structure according to any one of claim 1-6, is characterized in that, the quantity of described coiling tooth (32) and the ratio of described rotor (5) number of poles are 3:2.
10. the combining structure according to any one of claim 1-6, is characterized in that, described magnet steel (52) is fastened in described mounting groove (53) by fastener (57).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520517237.7U CN204886616U (en) | 2015-07-16 | 2015-07-16 | Integrated configuration of stator and rotor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520517237.7U CN204886616U (en) | 2015-07-16 | 2015-07-16 | Integrated configuration of stator and rotor |
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| CN204886616U true CN204886616U (en) | 2015-12-16 |
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| CN201520517237.7U Expired - Fee Related CN204886616U (en) | 2015-07-16 | 2015-07-16 | Integrated configuration of stator and rotor |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105186816A (en) * | 2015-07-16 | 2015-12-23 | 博格思众（常州）电机电器有限公司 | Stator and rotor combined structure |
| CN106300733A (en) * | 2016-08-31 | 2017-01-04 | 湖北立锐机电有限公司 | Interior permanent magnet machines based on I type rotor structure |
| CN112564343A (en) * | 2019-07-22 | 2021-03-26 | 威刚科技股份有限公司 | Rotating electric machine and rotor assembly thereof |
-
2015
- 2015-07-16 CN CN201520517237.7U patent/CN204886616U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105186816A (en) * | 2015-07-16 | 2015-12-23 | 博格思众（常州）电机电器有限公司 | Stator and rotor combined structure |
| CN105186816B (en) * | 2015-07-16 | 2018-08-03 | 博格思众（常州）电机电器有限公司 | The composite structure of stator and rotor |
| US10320274B2 (en) | 2015-07-16 | 2019-06-11 | Bergstrom, Inc. | Combination structure between stator and rotor in a brushless motor |
| CN106300733A (en) * | 2016-08-31 | 2017-01-04 | 湖北立锐机电有限公司 | Interior permanent magnet machines based on I type rotor structure |
| CN112564343A (en) * | 2019-07-22 | 2021-03-26 | 威刚科技股份有限公司 | Rotating electric machine and rotor assembly thereof |
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