CN209805528U - Combined array type outer rotor shaft radial mixed flux permanent magnet motor - Google Patents
Combined array type outer rotor shaft radial mixed flux permanent magnet motor Download PDFInfo
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- CN209805528U CN209805528U CN201920693513.3U CN201920693513U CN209805528U CN 209805528 U CN209805528 U CN 209805528U CN 201920693513 U CN201920693513 U CN 201920693513U CN 209805528 U CN209805528 U CN 209805528U
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- permanent magnet
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Abstract
The utility model discloses a combined array external rotor shaft radial mixes magnetic flux permanent-magnet machine, including motor external rotor and stator, wherein: the motor outer rotor includes: the rotor disc comprises a rotor disc iron core, a combined array type permanent magnet disc, radial surface-mounted permanent magnets, a bearing and an outer rotor shell; the combined array type permanent magnet disc is formed by an axial magnetizing oblique pole structure, tangential magnetizing concentric sector permanent magnets and filled soft magnetic materials alternately; the stator includes: the stator comprises a plurality of modularized T-shaped stator cores, distributed winding windings and a rotating shaft; the T-shaped stator core is provided with two axial stator teeth and a middle radial stator tooth, and two axial coils and a middle radial coil in the distributed winding are correspondingly wound respectively. The utility model provides a combination array external rotor shaft radial mixes magnetic flux permanent-magnet machine can improve the groove fullness rate, improve winding head utilization ratio, improve the torque quality, improve torque and power density and improve the whole operating efficiency of motor.
Description
Technical Field
The utility model belongs to the technical field of the motor, concretely relates to combined array external rotor shaft radial mixes magnetic flux permanent-magnet machine.
Background
The existing commonly used permanent magnet motors are generally divided into radial flux permanent magnet motors and axial flux permanent magnet motors, however, the utilization rate of the end parts of the permanent magnet motors is low, the utilization rate of the whole space of the motors is not high, and the torque density and the power density of the motors still have a lifting space.
In the traditional motor design, the size of the motor is optimized, for example, a radial permanent magnet motor adopts a structure with a large length-diameter ratio, and an axial permanent magnet motor adopts a structure with a small length-diameter ratio; techniques such as fractional concentrated winding are used to increase torque density, but their effectiveness is limited and the motor winding tips are difficult to utilize, so more compact motor structures are sought.
the utility model patent 201520407320.9 provides an axial radial mixed magnetic flux permanent magnet motor, its characteristics lie in that the motor is the external rotor structure, and the permanent magnet of all having arranged on stator core's the axial both sides and the casing in the radial outside, motor magnetic circuit pass through casing and stator core closure and form axial radial mixed magnetic circuit, all are provided with two axial and a radial winding on every stator core. However, the axial rotor is provided with the surface-mounted permanent magnet which is magnetized axially, the air gap magnetic density is relatively low, the cogging torque is large, and the motor torque quality, the torque density and the power density are influenced to a certain extent.
SUMMERY OF THE UTILITY MODEL
at least one in defect or improvement demand more than prior art, the utility model provides a combination array external rotor axial and radial mixes magnetic flux permanent-magnet machine aims at solving the technical problem that current axial and radial mixes magnetic flux permanent-magnet machine torque poor quality, torque density and power density are low.
In order to achieve the above object, according to an aspect of the present invention, there is provided a combined array type external rotor axial-radial hybrid flux permanent magnet motor, including a motor external rotor and a stator, wherein:
The motor outer rotor includes: the rotor disc comprises a rotor disc iron core, a combined array type permanent magnet disc, radial surface-mounted permanent magnets, a bearing and an outer rotor shell; the two axial rotor disks are both formed by a rotor disk iron core and a combined array type permanent magnet disk, the outer end of each rotor disk is fixed with the outer rotor shell to rotate together, and the inner end of each rotor disk is placed on a static rotating shaft shoulder through a bearing; the radial surface-mounted permanent magnets are uniformly attached to the inner wall of the outer rotor shell at intervals along the circumferential direction;
The combined array type permanent magnet disc consists of three parts which are alternated, wherein the first part is an oblique pole structure with a plurality of fan-shaped permanent magnets inclining towards the same direction, and two adjacent oblique pole fan-shaped permanent magnets are axially magnetized in opposite directions; the second part is a plurality of concentric fan-shaped permanent magnets and is magnetized tangentially; the third part is soft magnetic material filled between the first part and the second part; the polarities of the corresponding permanent magnets on the coaxial lines of the two rotor discs in the axial direction of the rotating shaft are opposite;
the stator includes: the stator comprises a plurality of modularized T-shaped stator cores, distributed winding windings and a rotating shaft; the T-shaped stator cores are circumferentially arranged between the static rotating shaft and the outer rotor casing in a surrounding manner and fixed on the rotating shaft;
The T-shaped stator core is provided with two axial stator teeth and a middle radial stator tooth, and two axial coils and a middle radial coil in the distributed winding are correspondingly wound respectively and are communicated with each other; the two axial stator teeth and the two axial coils are coaxial with the combined array type permanent magnet disc of the two rotor discs.
preferably, the radial surface-mounted permanent magnet is of a slant pole structure inclined to the same direction.
Preferably, the T-shaped stator core is made of soft magnetic composite materials through a powder metallurgy method, and the rotor disc core is made of steel materials.
The above-described preferred features may be combined with each other as long as they do not conflict with each other.
generally, through the utility model discloses above technical scheme who conceives compares with prior art, has following beneficial effect:
1. The utility model discloses a combination array external rotor shaft radial mixes magnetic flux permanent-magnet machine adopts combination array permanent magnet, and through adopting the tangential to sector permanent magnet to magnetize, the oblique pole permanent magnet adopts the axial to magnetize, then all the other parts are filled with soft magnetic material, utilize halbach array principle to improve air gap magnetic flux sine degree and improve magnetic flux density, and then improve motor torque and power density.
2. The price of permanent magnet is expensive, with high costs, the utility model discloses a combination array external rotor shaft radial mixes magnetic flux permanent-magnet machine adopts combination array permanent magnet, through filling soft magnetic material greatly reduced cost.
3. The utility model discloses a combination array external rotor axial radial mixes magnetic flux permanent-magnet machine, axial combination array permanent magnet adopt including the axial magnetize the oblique polar structure-radially magnetize not oblique concentric fan-shaped permanent magnet-another direction axial magnetize oblique polar structure and fill soft magnetic material's alternate integrated configuration, the permanent magnet polarity that corresponds on two axial rotor dish coaxial lines is opposite, but deuterogamy radial permanent magnet oblique polar structure greatly reduced motor tooth's socket torque, promotion torque quality.
4. The utility model discloses a combination array external rotor axial radial mixes magnetic flux permanent-magnet machine adopts T shape stator core, and axial radial magnetic field utilizes completely, and motor compact structure, power and torque density are promoted greatly.
5. the utility model discloses a combination array external rotor shaft radial mixes magnetic flux permanent-magnet machine adopts modularization T shape stator core, improves production efficiency, is convenient for process and later stage operation maintenance.
6. The utility model discloses a combination array external rotor shaft radial mixes magnetic flux permanent-magnet machine both can promote motor space utilization, can improve torque quality, torque density and system efficiency again, and this motor can be used to occasions such as high-end digit control machine tool electricity main shaft, robot joint, electric automobile wheel hub drive.
drawings
fig. 1 is a schematic cross-sectional view of a combined array type outer rotor axial-radial hybrid flux permanent magnet motor according to the present invention;
Fig. 2 is a perspective cross-sectional perspective schematic view of the combined array type outer rotor axial-radial hybrid flux permanent magnet motor of the present invention;
Fig. 3 is a schematic perspective view of the combined array type outer rotor axial-radial hybrid flux permanent magnet motor according to the present invention after the outer rotor casing is hidden;
Fig. 4 is an exploded schematic view of the combined array type outer rotor axial-radial hybrid flux permanent magnet motor of the present invention;
Fig. 5 is a schematic diagram of a T-shaped stator core of the combined array type outer rotor axial-radial hybrid flux permanent magnet motor of the present invention;
fig. 6 is a schematic diagram of a distributed winding of a combined array type outer rotor axial-radial hybrid flux permanent magnet motor according to the present invention;
Fig. 7 is a schematic diagram of the combination of the T-shaped stator core and the distributed winding of the combined array type outer rotor axial-radial hybrid flux permanent magnet motor of the present invention;
Fig. 8 is a schematic combination diagram of a rotor disc core and a combined array permanent magnet disc of the combined array type outer rotor axial-radial hybrid flux permanent magnet motor according to the present invention;
Fig. 9 is a schematic view of the combined array permanent magnet disc of the combined array outer rotor axial-radial hybrid flux permanent magnet motor and its magnetic flux.
Detailed Description
in order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention. Furthermore, the technical features mentioned in the embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other. The present invention will be described in further detail with reference to the following embodiments.
as a preferred embodiment of the present invention, as shown in fig. 1-9, the present invention provides a combined array type external rotor axial-radial hybrid flux permanent magnet motor, which includes an external rotor and a stator.
as shown in fig. 1 to 4, the outer rotor of the motor includes: a rotor disc iron core 6, a combined array type permanent magnet disc 5, a radial surface-mounted permanent magnet 2, a bearing 7 and an outer rotor casing 1; as shown in fig. 8, both axial rotor disks are composed of a rotor disk iron core 6 and a combined array type permanent magnet disk 5, the outer end of the rotor disk is fixed with the outer rotor casing 1 to rotate together, and the inner end of the rotor disk is placed on a shaft shoulder of a static rotating shaft 8 through a bearing 7; the radial surface-mounted permanent magnets 2 are uniformly attached to the inner wall of the outer rotor casing 1 at intervals along the circumferential direction. Preferably, the radial surface-mount permanent magnet 2 has a slant pole structure inclined in the same direction.
as shown in fig. 8-9, the combined array permanent magnet disk 5 is composed of three alternating parts, the first part 51 is an oblique pole structure in which a plurality of fan-shaped permanent magnets incline to the same direction, and two adjacent oblique pole fan-shaped permanent magnets are axially magnetized in opposite directions, which are respectively shown as x and · in fig. 9; the second part 52 is a plurality of concentric fan-shaped permanent magnets, and is magnetized tangentially, as shown by arrows from x to · in fig. 9; the third section 53 is a soft magnetic material filled between the first section 51 and the second section 52; the polarities of the corresponding permanent magnets on the coaxial lines of the two rotor discs in the axial direction of the rotating shaft 8 are opposite, and respective closed-loop magnetic fluxes are formed.
As shown in fig. 1 to 4, the stator includes: the stator comprises a plurality of modularized T-shaped stator cores 3, distributed winding windings 4 and a rotating shaft 8; the T-shaped stator cores 3 are circumferentially arranged between the static rotating shaft 8 and the outer rotor casing 1 in a surrounding mode, the encoder control plate 9 is fixed on the rotating shaft 8, and all the modularized T-shaped stator cores 3 are fixed on the rotating shaft 8 through the positioning holes through bolts.
As shown in fig. 5 to 7, the T-shaped stator core 3 has two axial stator teeth 31 and an intermediate radial stator tooth 32, which are wound correspondingly with two axial coils 41 and an intermediate radial coil 42 in the distributed winding 4, respectively, communicating with each other; the two axial stator teeth 31 and the two axial coils 41 are coaxial with the combined array of two rotor discs 5. The rotor disc iron core 6 and the combined array type permanent magnet disc 5, the outer rotor casing 1 and the radial surface-mounted permanent magnet 2 are fixed in a gluing mode.
Two radiating holes are formed in the T-shaped stator core 3 along the radial direction to improve the radiating efficiency of the stator, so that the power density of the motor is improved, and stator teeth are arranged on two axial sides and one radial side and used for distributed winding. The modularized T-shaped stator core is adopted, the axial and radial magnetic fields are completely utilized, the motor is compact in structure, the power and the torque density are greatly improved, the production efficiency is improved, and the processing and the later-stage operation and maintenance are facilitated.
as shown in fig. 7, the distributed winding 4 is wound around three teeth of the T-shaped stator core 3, and the winding direction is as follows: when current is introduced, the direction of magnetic lines of force generated by the current in the winding according to the ampere rule flows in from the teeth at two sides of the T-shaped stator core, flows out from the middle teeth, and when reverse current is introduced, the directions of the magnetic lines of force are opposite.
the embodiment of the utility model provides an in, the number of poles of T shape stator core, combination array permanent magnet dish and the number of poles of radial table pastes formula permanent magnet are all confirmed according to the pole slot cooperation of specific motor, and the pole slot cooperation of motor is decided by its rotational speed and mains frequency.
the embodiment of the utility model provides an in, T shape stator core's structural complexity adopts soft magnetic composite material to form through powder metallurgy's method processing, and simultaneously, this material possess very high resistivity, can effectively weaken stator core's eddy current loss, and rotor dish iron core is made with steel material with the external rotor casing.
As shown in fig. 1-4 and 9, the no-load magnetic flux starts from the N pole of the combined array permanent magnet part oblique pole permanent magnet on the rotor disc iron core on both sides, enters the axial stator teeth of the T-shaped stator iron core from the axial air gap, then enters the radial surface-mounted permanent magnet from the radial stator teeth of the T-shaped stator iron core through the radial air gap, enters the adjacent radial surface-mounted permanent magnet in the radial surface-mounted permanent magnet along the circumferential direction, enters the T-shaped stator iron core through the radial air gap, returns to the S pole of the combined array permanent magnet part oblique pole permanent magnet on the rotor disc iron core, and returns to the original oblique pole sector permanent magnet through the soft magnetic material and the tangential magnetizing sector permanent magnet in the combined array permanent.
It will be understood by those skilled in the art that the foregoing is merely a preferred embodiment of the present invention, and is not intended to limit the invention to the particular forms disclosed, but on the contrary, the intention is to cover all modifications, equivalents, and alternatives falling within the spirit and scope of the invention as defined by the appended claims.
Claims (3)
1. The utility model provides a combined array external rotor shaft radial mixes magnetic flux permanent-magnet machine, includes motor outer rotor and stator, its characterized in that:
The motor outer rotor includes: the rotor disc comprises a rotor disc iron core (6), a combined array type permanent magnet disc (5), a radial surface-mounted permanent magnet (2), a bearing (7) and an outer rotor casing (1); the two axial rotor disks are both composed of a rotor disk iron core (6) and a combined array type permanent magnet disk (5), the outer end of each rotor disk is fixed with the outer rotor casing (1) to rotate together, and the inner end of each rotor disk is placed on a shaft shoulder of a static rotating shaft (8) through a bearing (7); the radial surface-mounted permanent magnets (2) are uniformly attached to the inner wall of the outer rotor casing (1) at intervals along the circumferential direction;
The combined array type permanent magnet disc (5) consists of three alternating parts, the first part (51) is an oblique pole structure with a plurality of fan-shaped permanent magnets inclining towards the same direction, and two adjacent oblique pole fan-shaped permanent magnets are axially magnetized in opposite directions; the second part (52) is a plurality of concentric fan-shaped permanent magnets and is magnetized tangentially; the third part (53) is a soft magnetic material filled between the first part (51) and the second part (52); the polarities of the corresponding permanent magnets on the coaxial lines of the two rotor discs in the axial direction of the rotating shaft (8) are opposite;
The stator includes: the stator comprises a plurality of modularized T-shaped stator cores (3), distributed winding windings (4) and a rotating shaft (8); the T-shaped stator cores (3) are circumferentially arranged between the static rotating shaft (8) and the outer rotor casing (1) in a surrounding manner and fixed on the rotating shaft (8);
The T-shaped stator core (3) is provided with two axial stator teeth (31) and a middle radial stator tooth (32), and two axial coils (41) and a middle radial coil (42) in the distributed winding (4) are correspondingly wound and are communicated with each other; the two axial stator teeth (31) and the two axial coils (41) are coaxial with the combined array type permanent magnet discs (5) of the two rotor discs.
2. The combined array type outer rotor shaft radial mixed flux permanent magnet motor as claimed in claim 1, wherein:
The radial surface-mounted permanent magnet (2) is of an oblique pole structure inclined towards the same direction.
3. The combined array type outer rotor shaft radial mixed flux permanent magnet motor as claimed in claim 1, wherein:
the T-shaped stator core (3) is made of soft magnetic composite materials through a powder metallurgy method, and the rotor disc core (6) is made of steel materials.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920693513.3U CN209805528U (en) | 2019-05-15 | 2019-05-15 | Combined array type outer rotor shaft radial mixed flux permanent magnet motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920693513.3U CN209805528U (en) | 2019-05-15 | 2019-05-15 | Combined array type outer rotor shaft radial mixed flux permanent magnet motor |
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| Publication Number | Publication Date |
|---|---|
| CN209805528U true CN209805528U (en) | 2019-12-17 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920693513.3U Expired - Fee Related CN209805528U (en) | 2019-05-15 | 2019-05-15 | Combined array type outer rotor shaft radial mixed flux permanent magnet motor |
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| CN (1) | CN209805528U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110120716A (en) * | 2019-05-15 | 2019-08-13 | 华中科技大学 | A kind of combination array formula outer rotor axial and radial mixing behavior magnetic flow permanent magnet motor |
-
2019
- 2019-05-15 CN CN201920693513.3U patent/CN209805528U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110120716A (en) * | 2019-05-15 | 2019-08-13 | 华中科技大学 | A kind of combination array formula outer rotor axial and radial mixing behavior magnetic flow permanent magnet motor |
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| Date | Code | Title | Description |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20191217 |
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| CF01 | Termination of patent right due to non-payment of annual fee |